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Posted by: Raymond McDougall on 06.13.2017 | Filed under: Latest, Mineral Shows | Comments (0)

 

I’m publishing this one a bit later than I expected this year, but I hope you will enjoy the content all the same. And for those of you who are in hot summer places, perhaps harking back to northern spring will feel refreshing…

Each year, I personally love the arrival of the Rochester Mineralogical Symposium for two reasons.

First, it’s my favourite annual event in Mineral World. And second, the RMS always marks the arrival of spring out here in the Bancroft woods, with nicer temperatures and the occasional chance to drive with the windows down again.

So, in this photo taken the day before the Symposium, I’ll leave it to you as to whether Emery’s happy expression was about hanging out the window and soaking up the early spring sunshine or the arrival of RMS 2017…

Emery Window

…but my own happiness that day was about both!

If you’ve attended the RMS, you’ll know why it’s special. The Rochester Symposium is a unique event. It brings together professionals and amateurs, and a complete range of subjects in specimen mineralogy. It is collegial and friendly, meant for collectors and those who love to learn about minerals. The RMS prominently features What’s New in Minerals each year. It is also a mineral show with excellent dealers set up and open when the talks are not on. And the RMS is a true mineral community with great cameraderie – it’s a time for hanging out and having a good time with mineral friends, new and old. It’s possible a drink or two is shared among us, and a few mineral songs are always sung.

If you haven’t yet come, I hope you’ll join us next year. Rochester is meant for you as much as anyone! You can reserve the dates right now: April 19-22, 2018.

2017 RMS Presentations

Opening – Bill Pinch

We began the 2017 (44th) RMS acknowledging the passing of our friend Bill Pinch, the great mineral collector who began the Symposium 44 years ago. As this had happened only three weeks before the Symposium, this was a hard period for Bill’s family and friends.

At RMS 2017, the Program Notes began with an In Memoriam, written by Chairman Steve Chamberlain – I have reproduced it in full, below. Bill’s website hosts both a great In Memoriam by Mark Feinglos (which he wrote for The Mineralogical Record) and some other great links – I include the link below, under Links and References.

Steve also announced that RMS 2018 will be dedicated to Bill’s memory and, in celebrating him, we will have a Bill Pinch theme. In addition to a presentation about Bill himself, there will be talks on the subjects he loved most during his collecting career, including Tsumeb, rare minerals, and collecting fine minerals.

Bill was a good friend and a kind mentor to me. What we enjoyed most – as I’m sure was true with so many of his mineral friends – was losing all sense of time together talking about minerals. And so that’s what we all did at RMS 2017 – we enjoyed each other’s company and immersed ourselves in minerals.

The King of Tides: Nova Scotia’s Bay of Fundy

I gave the first talk of the 44th Rochester Symposium, about the minerals of the Bay of Fundy. For those of you who know my website, you will have seen the articles I have posted on the blog (Collecting the Bay of Fundy, and Collecting on the Islands). Although the RMS presentation was about the minerals from the classic Bay of Fundy localities discussed in the blog posts, I had a different goal in putting it together.  My goal was to share not only the story and scenery, but specifically some of the top specimens, to show how great they can be. Those specimens reside primarily in a few Canadian collections, and so there was a collaborative effort to track them down and photograph them. This talk was only possible with the involvement of several people, so the presentation slides have four additional authors – Terry Collett, Ronnie Van Dommelen, Michael Bainbridge and David Joyce. Together, our efforts resulted in a well-received talk and many photographs of specimens that, until now, have not been well-known beyond our local circles. Some stunning pieces have been found on the Bay of Fundy.

Chabazite, Wasson's Bluff, Cumberland Co., Nova Scotia

Chabazite, Wasson’s Bluff, Cumberland Co., Nova Scotia – 7 cm
Terry Collett collection, Ronnie van Dommelen photo.

RonnieChabazite

Chabazite on Heulandite, Wasson’s Bluff, Cumberland Co., Nova Scotia – 14 cm
Ronnie Van Dommelen collection and photo.

DaveTwinChabazite, Wasson's Bluff, Cumberland Co., Nova Scotia

Chabazite, contact twin, Wasson’s Bluff, Cumberland Co., Nova Scotia – 1.2 cm crystal
(Penetration twins are common at Wasson’s Bluff, but contact twins are not.)
David Joyce collection and photo.

Copper, Cape D'Or, Nova Scotia, Beckett Collection, Michael Bainbridge photo

Copper, Cape D’Or, Cumberland Co., Nova Scotia – 15 cm
Largest spinel-law-twinned crystal 5 cm
Robert Beckett collection, Michael Bainbridge photo.

Copper, Cape D'Or, Cumberland Co., Nova Scotia
Copper, Cape D’Or, Cumberland Co., Nova Scotia – crystal 15.7 cm
Rod and Helen Tyson collection, Michael Bainbridge photo.

Thomsonite, Cape D'Or, Cumberland Co., Nova Scotia, George Thompson specimen, M. Bainbridge Photo

Thomsonite, Cape D’Or, Cumberland Co., Nova Scotia – 10.5 cm
Originally in the Doug Wilson collection, now George Thompson collection,
Michael Bainbridge photo.

18cm wide

Natrolite, Diamond Island, Five Islands, Cumberland Co., Nova Scotia – 18 cm
Ronnie Van Dommelen collection, Michael Bainbridge photo.

6.7cm high

Stilbite, Five Islands, Cumberland Co., Nova Scotia – 5.7 cm
Rod and Helen Tyson collection, Michael Bainbridge photo.

Michael Bainbridge is taking superb photos for collectors and publications these days – a link to his website is below, under Links and References.

Overview of Silicate Structures 

At the last minute, Dr. Frank Hawthorne was unable to attend and present at the RMS. Thanks to an above-and-beyond effort by Dr. Robert Lauf, this talk was in fact still presented at the RMS – Bob was up into the wee hours of the night working with the original slides to that he could then give both this talk and his own talk on Friday morning.

Bob gave a tough subject and it was a great morning for learning. After a late night of fun with friends, it’s not easy to greet the next morning in a dark presentation room hearing the opening statement “silicates are a complex business…”

However, this talk gave context and focus for what is in fact an important issue in mineral work.

Silicate structures have been generally understood since the 1930s, when William Bragg developed the silicate groups that are still in use today. Those groups are defined on the basis of the nature of the structural organization within the minerals. Silicates are all defined by having a silicon-oxygen tetrahedron- SiO4 – at the heart of their structure, and the key differentiating factor among silicates derives from the way in which each such Si04 tetrahedron is linked to others. This linkage is determined by the way in which the SiO4 tetrahedron shares the other elements within the mineral. This can result in chains, rings and other arrangements, and as a result, the silicates are grouped on this basis – inosilicates, cyclosilicates, orthosilicates, tetrasilicates.

Silicate structures are vitally important, and this talk highlighted why. When we are conducting analyses to identify and define minerals, we can know certain things from chemical analysis, but ultimately we may need to combine chemical and structural analysis to arrive at a proper definition and identification. In fact, structural analysis can be determinative. For example, the mineral wiluite is identified conclusively by understanding the structure – the structure will reveal which site in the mineral’s composition is occupied by boron, and that is determinative in the correct identification.

The silicates require much more structural work. Although definitive work has been completed with other mineral groups, the same cannot be said for the silicates – it is an overwhelmingly large subject, with lots yet to be done.

Orthosilicates

Fresh off giving the first talk, Bob Lauf was up at the podium to give the talk he had planned to give – an overview of the orthosilicate minerals. The orthosilicates include many awesome minerals, such as the titanite group, the zircon group, the garnet group, the humite group, vesuvianite and topaz, and this talk included many photos.

Clinohumite

Clinohumite, Jikhan, Koksha Valley, Badakhshan, Afghanistan 2.5 cm crystal
R. Lauf specimen and photo.

The orthosilicates are defined not by chains or rings, but by isolated groups of SiO4 tetrahedra. Bob likened the results of packing these SiO4 groups, together with the metals, to packing groups of organized ball bearings, with configurations that vary mineral to mineral. In general, the orthosilicates have dense, tightly-packed structures, and this can often mean a high surface hardness and toughness – many of these minerals survive weathering exceptionally well. Meanwhile, properties like cleavage, striations and crystal forms are determined by the metals within the structure, not the SiO4 tetrahedra.

Bob has a new book out, Collectors’ Guide to Orthosilicates. A link is below under Links and References.

 Grossular CaliforniaGrossular, Calixico, California – 8 cm
R. Lauf specimen and photo.

Technical Session

Every Friday afternoon at the RMS, we have what we colloquially call the “Technical Session”, Contributed Papers in Specimen Mineralogy, moderated by Dr. Carl A. Francis. This session is packed with great 15-minute talks on a range of topics, some completely specimen-oriented, some more mineralogical. I don’t write at length in these blog posts about the Technical Session talks, because the abstracts from these talks are published during the year in Rocks and Minerals magazine (don’t forget to watch for them!) and they are published in the RMS Program Notes.

However I really want to highlight the Technical Session for a moment this year. One reason is because the Technical Session is one of the features that makes Rochester unique, with professionals and amateurs all contributing. For collectors, there is a lot of interest in these talks – sometimes about rare or new minerals or finds, sometimes about localities, sometimes about scientific work done to establish fakes in Mineral World. And perhaps even more this year than in recent memory, we had a high percentage of truly excellent talks given by students. The group from the Department of Geology and Environmental Earth Science, Miami University, Oxford, Ohio did a particularly outstanding job. Too often, we look around Mineral World and see fewer young people than we’d all like – these students represent a bright future for mineralogy and the science that underpins everything we enjoy in Mineral World.

Friday Night

The Monteponi Mine, Sardinia, Italy

Our Friday night presentation was The Monteponi Mine, Sardinia, Italy, given by Dr. Renato Pagano, one of the world’s pre-eminent mineral collectors. The Renato and Adriana Pagano Collection includes 13,500 specimens, and 4,300 species, making it one of the most remarkable collections ever assembled.

Renato gave a great talk on this classic locality, with great photos. One of my favourite facts from the talk was the origin of the name Monteponi (since we’ve all seen it on musuem labels and in the literature for decades…).  The name has evolved from its original name, Monte Paone. Paone was an old Italian word meaning peacock, so it is Mount Peacock. Monteponi is a slightly (!) older locality than our New World ones – the Carthaginians mined silver-bearing galena there from the 6th century BC, and Monteponi later provided silver and lead to the Roman Empire, particularly for coinage and pipes, respectively.  Renato took us through the history and stories from the past, including the tragic incident in which one of the great phosgenites was presented as a gift to a clumsy Swedish ambassador who dropped and destroyed it.

Among collectors, Monteponi is most famous for having produced the world’s finest phosgenite crystals.

I had to include this one in this post  – I have loved this crystal for about 40 years, as its photograph was featured in one of the first mineral books I ever owned, as a child (Encyclopedia of Minerals and Gemstones).

Phosgenite, Monteponi, Sardinia, Roberto Appiani photo Phosgenite, Monteponi, Sardinia, Italy – 2.5 cm crystal
Milan Natural History Museum specimen, Roberto Appiani photo.

And here are two great phosgenite specimens from the Pagano collection:

Phosgenite Monteponi Pagano Collection Roberto Appiani photo

Phosgenite in a vug in galena, Monteponi, Sardinia, Italy – 6 cm
Renato and Adriana Pagano collection, Roberto Appiani photo.

Phosgenite Monteponi Pagano Collection Roberto Appiani photo

Phosgenite crystals, Monteponi, Sardinia, Italy – 2 cm
Renato and Adriana Pagano collection, Roberto Appiani photo.

Monteponi is also known as a locality for exceptionally fine anglesite crystals.

Anglesite Monteponi Pagano Collection Roberto Appiani photo

Anglesite, Monteponi, Sardinia, Italy – 8 cm
Renato and Adriana Pagano collection, Roberto Appiani photo.

A comprehensive article on Monteponi by Renato, together with Wendell Wilson, is included in The Mineralogical Record, November-December 2014, Vol. 45, No. 6 . If you haven’t yet read it, it’s superb, and if you read it when it came out, maybe time for another read…

Saturday – Annual What’s New

At the heart of the Rochester Symposium for decades, the annual Saturday morning presentations have captured highlights of what has been new in Mineral World over the prior year or so, focusing on fine mineral specimens for collectors.

What’s New in Minerals and Localities – Part I – Jeff Scovil

Jeff Scovil leads our worldwide survey of exceptional new mineral specimens, with an hour of stunning photos. It doesn’t matter who was up for how long having fun the night before, the room is always packed. Jeff’s presentation is always a Symposium highlight!

So here are a few photos to give you a sense – imagine an hour of this… It’s Mineral Heaven!

Euclase

Euclase, La Marina Mine, Muzo District, Boyaca, Colombia
Crystals to 5 cm
Irv Brown collection, J. Scovil photo.

Djurleite2

 Djurleite, Aït Ahmane MineBou Azzer, Ouarzazate, Morocco – 4 cm
Steve Smale collection, J. Scovil photo

Djurleite1
Djurleite, Aït Ahmane Mine, Bou Azzer, Ouarzazate, Morocco – 6 cm
Fine Gems and Minerals specimen, J. Scovil photo

Wulfenite China Jeff Scovil

Wulfenite, Jianshan Mine, Xinjiang, China – 4.3 cm
Sam Yung specimen, J. Scovil photo.

Apophyllite Bowtie Jeff Scovil

Fluorapophyllite, Aurangabad, Maharastra, India – 3.2 cm
Spirifer specimen, J. Scovil photo.

Elbaite Morocco

Elbaite tourmaline with albite, Ouarzazate, Morocco – 3.3 cm
Spirifer specimen, J. Scovil photo.

Fluorite Jeff Scovil photo

Fluorite, Huanggang Mines, Inner Mongolia, China – 8.9 cm
Steve Smale collection, J. Scovil photo.

And this last one may not be quite as recent, but the photo is, and the lighting on these crystals is simply as good as mineral photography can get…

Wulfenite Red Cloud Jeff Scovil

Wulfenite, Red Cloud Mine, Trigo Mountains, La Paz Co., Arizona – 3.9 cm
Unique Minerals specimen, J. Scovil photo.

Jeff is the Yoda of mineral photography. If you would like him to photograph your minerals, or you are looking for mineral photos for a publication, his website is under Links and References.

What’s New in Minerals and Localities – Part II

Part II of What’s New in Minerals is open to contributions from attendees. We had a couple of presentations about new books, including one mineral book, an upcoming book by Van King on Franklin, New Jersey, so we’ll keep our eyes open for that.

I then presented a few more examples of what has been new in Mineral World over the last year or so. If you’ve been following this website over the past year, you’ll be familiar with most of these.

Just a note of explanation about photographs here. Below each photo, I am including a link to the applicable blog post on the website where you can see more photos and specimens than are here. (Every new mineral update on this website is represented by a blog post, so even if you didn’t see a specimen before it sold and was removed, there is a nice record of my favourite photos from each update preserved in the blog.)

I’ll begin with the “Synchysite Mystery”… this goes back to a find from 2015, but the analytical work was completed in 2016…

In late 2015, I had posted on the website a small number of “synchysite” crystals from Novo Horizonte, Bahia Brazil. Although they had been sold to me as synchysite, some question arose as to confirmatory identification of these, in part thanks to some work that was ongoing to describe the new mineral parisite-(La) (described in my Tucson 2017 blog post). Analysis by Don Doell, first at the lab at University of Arizona, began to confirm more about their identity. Don then conducted semi-quantitative EDS at SGS Labs and narrowed things down. These are in fact phosphate mineralization: they are likely a combination of rhabdophane-(La), rhabdophane-(Ce) and possibly including monazite-(Ce). They appear to be pseudomorphs after a REE carbonate, probably in the parisite group, given that parisite-(La) has been found at Novo Horizonte in crystals with a similar aspect and appearance, at a similar time (therefore possibly similar part of the deposit). They could also be after bastnasite-(La), which has been described from the locality, although these are most similar in aspect to the parisite-(La) crystals. For now, I’m labelling them rhabdophane, pseudomorph after parisite, with the proviso that the above is the technically closest identification information to date. Thanks very much to Don for this analysis!

Rhabdophane, ps Parisite, Novo Horizonte, Bahia, BrazilRhabdophane, ps Parisite, Novo Horizonte, Bahia, Brazil – 4.3 cm
(More photos/specimens)

 A few other “What’s New” entries:

Aragonite, Mamsa, nr. Sidi Ayed, Boulemane Province, Fes-Meknes Region, Morocco

Aragonite, Mamsa, nr. Sidi Ayed, Boulemane Province, Fes-Meknes Region, Morocco – 6.9 cm
W.W. Pinch collection.
(More photos/specimens)

 Rutile, var. Struverite-Ilmenorutile, Santa Rosa Mine, Itambacuri, Doce Valley, Minas Gerais, Brazil

Rutile, var. Struverite-Ilmenorutile, Santa Rosa Mine, Itambacuri, Doce Valley, Minas Gerais, Brazil – 3.1 cm
(More photos/specimens)

 Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil

Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil – 3.2 cm
Jack Smith collection.
(NB: If you are interested in these, I was able to acquire five more in Ste. Marie and they will be on the website soon)
(More photos/specimens)

Red Phantom Quartz, Orange River, Cape Province, South Africa

Quartz with Red Phantoms, Orange River, Northern Cape Province, South Africa – 5.2 cm
(More photos/specimens)

More Saturday Presentations

mindat.org – Sixteen Years On: How mindat is Driving New Scientific Discoveries

Jolyon Ralph followed with a talk about mindat as it is today, status, and uses. (Jolyon has presented to the RMS on mindat before, so this was an update). As perhaps all of you know, mindat.org is a “Wikipedia”-like site for mineral information, contributed by users and monitored by administrators. What fewer of you may know (along with me, I didn’t!) is that mindat now hosts over 5 million pages, including 800,000 photographs and profile information for 280,000 localities. (!) (As an aside, Jolyon calculated that the information on mindat would now print a stack of paper 5 km tall.)

Jolyon explained how mindat is now being used for scientific studies and more analytical use. He highlighted that mindat is now being used to draw links between localities, particularly with a view to predictive occurrence among similar types of deposits and occurrences. He also explained that an important consideration when using mindat relates to the biases of users and contributors. For example, there is far more collector interest in crystals of wulfenite than there is in crystals of nepheline, so the amount and quality of information on mindat for wulfenite is different than it is for nepheline.

Mindat is an incredible resource and it was interesting to hear the new ways in which it is being used.

Upside Down and In the Future – Mining Tasmania’s Adelaide Mine

Saturday afternoon was amazing. John Cornish led off with his great talk about the Adelaide Mine in Tasmania, the world’s preeminent crocoite locality. John is involved with the Adelaide Mine project and shared his experience with enthusiasm! He took us on a tour of the mine region, with great information on local flora, fauna and history. And then he took us underground, to see pockets of crocoite up to 7×4 metres. (!) Just amazing…

Crocoite Pocket at the Adelaide Mine, Tasmania, John CornishCrocoite Pocket at the Adelaide Mine, Tasmania
John Cornish photo.

There was one particular story I had not heard and really enjoyed…

All field collectors must adapt to the conditions and nature of the occurrence they are working. What that means in practice is that often the tools that will be of most help will vary wildly from one mineral locality to the next. And I think it’s safe to say that all of us who have done field work for a long time have found resourceful ways of addressing issues, and collecting more efficiently. Often, the need for resourcefulness is driven by our desire to minimize the risk to specimens in the extracting process. Clearly, care is required when collecting crocoite! And in his focus on minimizing damage, John had a resourceful way of minimizing percussion and therefore lowering the risk of popping crocoite crystals off…

Crocoite Underground at the Adelaide Mine, Tasmania, John CornishTrimming crocoite matrix with a hand saw, underground at the Adelaide Mine, Tasmania
Brilliant!
John Cornish photo.

Some of the specimens recovered from the Adelaide Mine have been huge. Sometimes with large specimens in the field, we might include a prospector’s pick for scale. But in this case, John simply had himself included for scale.

Crocoite from the Adelaide Mine, Tasmania, John Cornish Crocoite from the Adelaide Mine, Tasmania
A very happy, if dirty, John Cornish for scale.

Crocoite from the Adelaide Mine, Tasmania, John Cornish

Crocoite from the Adelaide Mine, Tasmania
John Cornish photo.

John’s enthusiastic account was a highlight of RMS 2017.

If you are interested in seeing a bit more online about the Adelaide Mine, and more crocoite specimens, I am including a link to the Adelaide Mining Company’s website below, under Links and References.

Red Cloud Mine – The World’s Greatest Wulfenite Locality

John’s talk was a hard act to follow, but was Les Presmyk ever up to the task…

Les presented on the Red Cloud Mine, a locality that has inspired many of us as collectors since we began collecting minerals. Who doesn’t dream at night of perfect, glassy, sharp, lustrous. red-orange bevelled-square wulfenite crystals from this legendary mine? (Be honest.)

The Red Cloud is located in the Trigo Mountains, near the western border of southern Arizona. It was named after the prehistoric Red Cloud Trail, which leads to the west, on the California side of the Colorado River nearby.

Les took us through the early history of the mine, with some fascinating insights. One I liked was the explanation that because it is so relatively barren with no trees, lumber had to be brought in for quite a distance and was therefore expensive. Of course they did this to timber the mine tunnels, but it was too expensive for miners’ homes. So, the miners made their homes by digging tunnels into the side of the hill, to protect themselves and their belongings from the elements.

This presentation focused on significant mineral collecting at the Red Cloud over the years, beginning with Ed Over’s famous finds in the 1930s, and detailing the 1990s project by Wayne Thompson, James Horner and Les. During this time, the Red Cloud Mine was developed as an open pit operation, specifically for wulfenite specimens.

The most striking fact for me about this project was that from 1995 through 1999, only one significant pocket was found during the entire project – the 1997 pocket, that measured approximately 6 ft x 4 ft. That was it. For all the money spent on each year’s mining, very little was found. After major overburden removal beginning in 1995, and mining for months in advance of the Tucson show in early 1997, the team had assembled one flat of “decent” specimens from vugs and small pockets (under 10cm). Later in 1997 they hit the significant pocket, and from then until they stopped, very little was found – scare pockets and a few good specimens.  Suffice it to say, for the period following the 1997 pocket, the expenses far exceeded the value of specimens recovered. This puts into real perspective just how remarkable it is to have excellent Red Cloud wulfenite specimens from any era – they are rare and have come out of the ground at major cost.

Wulfenite Red Cloud Scovil

Wulfenite, Red Cloud Mine, Trigo Mountains, La Paz Co., Arizona – 10.7 cm
Les and Paula Presmyk specimen, J. Scovil photo.

Wulfeniteonquartz.RedCloudMine.Scovil2011-04-0081

Wulfenite, Red Cloud Mine, Trigo Mountains, La Paz Co., Arizona – 4.3 cm
Les and Paula Presmyk specimen, J. Scovil photo.

This was a super talk!

Just as an aside, Red Cloud has been written about a lot, given its legendary status among mineral localities.  Of the many published articles and chapters in books, I particularly like the accounts in “Collecting Arizona, State of Mines, Legacy of Minerals” (recounted by Tony L. Potucek, Les Presmyk, Richard Graeme and others, edited by Terry Wallace with Gloria Staebler, Ray Grant, Suzanne Liebetrau and Tom Wilson, published by Lithographie, 2012), and I personally was originally inspired by the Red Cloud Mine section in Peter Bancroft’s classic “Gem and Crystal Treasures” (published by Western Enterprises-Mineralogical Record, 1984). These are good reads – I highly recommend them.

Sunday Finale

By Sunday morning, it was time to recover from all the orange and red crystals from Saturday afternoon.

In past years, we have sometimes had lower attendance on Sunday mornings, but again this year Sunday morning was most-hands-on-deck. (Granted a few stragglers had had too much fun Saturday night.)

Meet an Important Unknown Mineralogist

Belgian collector Herwig Pelckmans led off with a talk that was fascinating, and not only for its subject matter. In his research and work on certain minerals, Herwig had come across the name Vaes, in connection with several uncommon species, and he was curious to know who “Vaes” was. However, when he looked him up, there was almost no information readily available. And so Herwig began an extensive research investigation that led him eventually back to the family and descedants, as he learned about the mineralogist Johannes Vaes (1902-1978). Vaes was a Dutch mining engineeer who became a mineralogist in the Democratic Republic of the Congo. He worked with the company Union Miniere du Haut Katanga, and he identified and defined several new minerals.

Johannes Vaes, CongoJ. F. Vaes in Jadotville (now called Likasi), when he was most likely in his early thirties.
Unknown photographer. Copyright H. Pelckmans

Vaes was at the famous Shinkolobwe Mine, and it was here that he made his discoveries.

Shinkolobwe
Old Belgian postcard showing the open pit of the Shinkolobwe uranium mine, printed by Nels.
Notice the original French spelling of the locality. Photo and copyright H. Pelckmans.

One striking fact about Vaes’ discoveries is that the only scientific instrument he had at his disposal was a polarizing microscope.

Saleeite, Shinkolobwe, Paul DeBondt

Saleeite, Shinkolobwe Mine, Shinkolobwe, Katanga Copper Crescent,
Katanga, Democratic Republic of the Congo
Field of view 3.6 cm
Paul De Bondt specimen and photo.

The mineral vaesite (NiS2) is named in his honour.

Vaesite, nepouite, uraninite, Shinkolobwe

Vaesite with Nepouite coating, associated with black uraninite crystals
Shinkolobwe Mine, Shinkolobwe, Katanga Copper Crescent,
Katanga, Democratic Republic of the Congo
Field of view 3.5 cm, vaesite crystal 1.1 cm.
Paul De Bondt specimen and photo.

At the end of this talk, we had an example of one of the great things about the RMS – the amazing pool of mineral knowledge and mineral history knowledge that is collected together in that ballroom. Van King was able to add an extra footnote to the talk, giving further context for the mineral collecting community: he was able to share that Vaes had in fact been the boss of famous mineral dealer Gilbert Gauthier (who was ultimately responsible for handling many of the fine DRC specimens that now grace collections around the world).

The Pioneer District, Pinal County, Arizona – The Silver King and Magma Mines

Les Presmyk gave the final talk at RMS 2017, about the Silver King Mine and the Magma Mine in the Pioneer District. This was another excellent presentation, with detailed historical accounts and wonderful historical photos. This one really struck me – today, it is hard to imagine horse/mule-drawn ore trains.

Silver King, Ore Wagon, 1880s.AHS

Mule-drawn ore wagons at the Silver King Mine, 1880s. AHS Photo.

This part of the talk is very well represented by Les’s recent excellent article in The Mineralogical Record, “The Arizona Silver Belt: Silver King to McMilllenville”, The Mineralogical Record July-August 2015, Vol. 46:4.

Les then spoke about the famous Magma Mine, where he had worked as a mining engineer. This mine is probably best known among collectors for the glassy barites it produced, but it also produced some wonderful calcite specimens.

Calcite.MagmaMine.3700L.Scovil2011-07-0105

 Calcite, 3700 Level, 4D Stope, Magma Mine, Superior, Pinal Co., Arizona -11.1 cm
Les and Paula Presmyk specimen, J. Scovil photo.

Barite.3600.4D.Magmamine.Superior.Scovil2011-07-0096

  Barite, 3600 Level, 4D Stope, Magma Mine, Superior, Pinal Co., Arizona – 7.1 cm
Les and Paula Presmyk specimen, J. Scovil photo.

The Rest of the Fun

As I write every year in my RMS posts, a lot of the best of Rochester occurs beyond the talks – in the halls, over meals, and on the 4th floor (the dealer floor, open when talks are not on).  Socializing continues well into the morning hours each night, and includes a few traditions – among others, the not-to-be-missed Saturday night mineral songs with David Joyce. (I assume most have heard Dave’s mineral collecting and mining tunes, but if not, I’m including a link below).
The collegiality at the RMS is unique among mineral events!

Displays

The Exhibit Room had great displays this year, as every year. Some are contributed by museums and many are contributed by collectors attending the RMS.

Terry Huizing Calcite Display, Rochester 2017

Calcite, Terry Huizing collection.
Amazing variety in this case.

As a reader, I often find it hard to take in many full-case displays in photos,  so here are just a few of the specimens that really struck me.

This brilliant bournonite in John Betts’ case has truly gorgeous twinning.

Bournonite, Yaoganzian Mine, John Betts collection

Bournonite, Yaoganxian Mine, Hunan, China – 3.6 cm
John Betts collection.

A huge spinel from the classic New York locality featured in the display from the New York State Museum.

Spinel, Monroe, Orange Co., New York, New York State Museum, Steve Chamberlain Collection

Spinel, Monroe, Orange Co., New York – approx 15 cm
Steve Chamberlain collection at the New York State Museum.

Super quartz from Palermo No.1 – for all the world looks like a fine contemporary Brazilian quartz, with bright, glassy lustre not conveyed in the photo.

PalermoQuartz

Quartz, Palermo No. 1 Mine, North Groton, New Hampshire – approx 7 cm
Mined by Bob Whitmore. Maine Mineral and Gem Museum

A great nest of silver wires from Beaverdell, in George Thompson’s case.

Silver, Highland Bell Mine, Beaverdell, British Columbia, George Thompson collection

Silver, Highland Bell Mine, Beaverdell, British Columbia – approx 5 cm
George Thompson collection.

Two super specimens from John Medici’s case.

Celestine from Holloway Quarry, Fluorite from Auglaize Quarry
Celestine, Holloway Quarry, Newport, Michigan – approx 7 cm
Fluorite with Calcite, Auglaize Quarry, Junction, Ohio – approx 5 cm
John Medici collection.

This hematite took my breath away. It is spectacular! It was part of an excellent display case of hematite and goethite from the Diane Francis collection.

Hematite, Congonhas, Minas Gerais, Brazil, Diane Francis collection
Hematite, Casa de Pedra Mine, Congonhas, Minas Gerais, Brazil – approx 7 cm
Diane Francis collection.

David Joyce had a great case of Grenville minerals. I thought rather than include something you might be expecting, like one of Dave’s great titanites, fluorapatites or zircons, I’d opt for something we don’t usually see from the Grenville. This is a striking, bright yellow sphalerite crystal.

Sphalerite, Balmat, St. Lawrence Co., New York, David Joyce collection, formerly Bill Pinch collection

Sphalerite, Balmat, St.Lawrence Co., New York – approx 5 cm
David K. Joyce collection

This beautiful sphalerite was formerly in Bill Pinch’s collection, and he gave it to Dave as a gift, so it seemed particularly fitting to include as my last photo entry from the cases this year.

Bill Pinch

As mentioned above, the following is the full In Memoriam written by Steve Chamberlain and included at the beginning of the RMS Program Notes this year.

In Memoriam – Rochester Mineralogical Symposium

Bill Pinch passed away on April 1, 2017 from complications of earlier surgery. A reception will be held this year in Rochester, New York, to celebrate his life. Next February, there will be a memorial service in Tucson, Arizona. We will celebrate his many achievements next April at the 45th Rochester Mineralogical Symposium.

Bill was an elemental force in specimen mineralogy. One of his most significant achievements was the initiation of the Rochester Mineralogical Symposium. The First Annual Mineral Workshop was held 20-21 April 1974 at the Sheraton Inn in Canandaigua. Under the auspices of Mineral Section President, Kay Jensen, Bill and Dave Jensen served as co-chairmen this first year. The second workshop, now the Rochester Mineralogical Symposium, was held 17-20 April 1975 in the downtown Holiday Inn and was again co-chaired by Bill and Dave Jensen.

For the next ten years, Pinch served as convening co-chairman and helped build the Symposium into an internationally-recognized annual event, setting the highest standards for speakers, exhibits and congeniality. He initiated the annual What’s New in Minerals – still a popular Saturday morning part of the event. He also began the annual production of Program Notes. With the 13th RMS, formal leadership of the Symposium passed to others, but Bill continued to serve as an advisor. With his support, the Technical Session was added to the Friday afternoon program and important mineralogical works were reprinted, including Goldschmidt’s Atlas der Krystalformen and Beck’s Mineralogy of New York State, to name just a few.

At the 25th Symposium, Bill gave a keynote address, “50 Years of Mineral Collecting; 25 Years of the Symposium”.  The preceding year, the Symposium had donated the annual proceeds of its annual auction to the successful funding effort for the Canadian Museum of Nature to purchase the W.W.Pinch mineral collection, establishing another legacy.

Slowly, over the next decades, Bill drifted away from direct participation in the Symposium We were delighted by his attendance at the 43rd RMS on the occasion of Michael Bainbridge’s talk, “The William W. Pinch Collection at the Canadian Museum of Nature”. The coming book of the same title will be a fitting memorial to Bill’s success in assembling a world-class mineral collection.  Here we acknowledge our debt to Bill for his successful efforts in beginning and growing the Rochester Mineralogical Symposium. Godspeed.

2018 RMS

As I mentioned up top, RMS 2018 will be a little different – it will be dedicated to Bill’s memory, and it will include talks on several topics that were close to Bill’s heart – among them, Tsumeb, Rare Minerals and Fine Minerals. Stay tuned for updates, as arrangements are finalized.  The dates are April 19-22 ,2018.

Until Next Year…

The Rochester Symposium is a great event, that has seen many of Mineral World’s most prominent names as contributors. At the same time, the Symposium continues to embrace contributions from all levels in mineral collecting – it simply would not be what it is without everyone who contributes.

Of course, the Symposium could literally not happen without the dedicated efforts of the team who put it together – countless thanks to Steve Chamberlain (chair), Helen Chamberlain (registrar), and many others on the committee and those helping at the event and in the background, including Dan Imel, Carl Francis, Bruce Gaber, Brian McGrath, Bob Morgan, Betty Fetter, George and Susan Robinson, Quintin Wight, Elizabeth Von Bacho and Tom White. I hope I haven’t missed anyone!

And thank you to all of the speakers and photographers from this year, for all of your help with photos to share through this report.

Links and References

If you are seeking links for anything mentioned above, some of these may be of interest:

On Bill Pinch’s website, there are tabs for the In Memoriam and also Links (this latter includes three links, with a video produced after the Canadian Museum of Nature acquired his original collection).

Our amazing professional mineral photographers (who – of course – take photos of private collection specimens for individual collectors): Jeff Scovil and Michael Bainbridge 

The new book by Robert J. Lauf: Collectors’ Guide to Orthosilicates

The Adelaide Mining Company has lots more crocoite photos (mining and specimens available) on its website. The underground photos are in the History section – they really give a sense of how tight most of these pockets have been, and provides good context for how remarkably well the specimens have been collected and preserved.

David K. Joyce has written – and plays and sings, of course – the soundtrack for so many great times in minerals. The tunes are available on itunes and the CD is available from Dave – if you’d like to hear them, here is the page where you can listen.

When they are available, the 44th RMS Program Notes will be posted online here.

Posted by: Raymond McDougall on 08.06.2016 | Filed under: Latest, Mineral Shows | Comments (0)

There really is no event in the Mineral World year exactly like the Rochester Mineralogical Symposium. It may sound scientific and formal, but Rochester is perhaps the most welcoming and inclusive mineral gathering I know.

Rochester is not meant to be a strictly scientific symposium – it is meant for anyone who wants to learn more about topics in mineralogy. At Rochester, many of the best-known mineral people of our time, mineralogists, curators, collectors (including beginners) and students, all share and learn together. And we have a good time together too. How often, in any field of study, does one find this kind of collaboration and true camaraderie among people from the top of the profession through to early-stage amateur enthusiasts? It’s a great experience.

So if you’ve never come, why not plan to come next year? Rochester is meant for you as much as anyone! You can reserve the dates right now: April 20-23, 2017. The great 2017 speakers list is below…

2016 RMS Presentations

Our presentations this year spanned a real range of speakers and topics.

Thursday night we began with a talk about mineral adventure, to the southern coastline of Baffin Island, Nunavut, in Canada’s far north. This is the kind of adventure few of us will ever be able to (or would dare to) undertake. Our speaker was Brad Wilson. Brad is perhaps best known as a superb faceter of gemstones, from traditional coloured gemstones to rare and soft collector stones. He describes his trips as “part of my fearless love of nature”.

Have you ever seen anything like this from Baffin? (!)

Fluorapatite, Baffin Island, Nunavut, Canada

Fluorapatite, Kimmirut, Baffin Island, Nunavut, Canada – 12 cm
B. Wilson specimen and photo

Over the years, during many trips, Brad has adventured for minerals in the far north of Canada – each of these trips is amazing. This is truly remote territory, with no settlements beyond Brad’s starting point, and he must fly his Zodiac watercraft from his home in Ontario to Baffin Island, so that he has a way to navigate the water. Once he’s out on his trip, he has no-one to rely on beyond himself, and he has nothing except what he takes with him! And when there are polar bears around, things can become less than ideal…

Baffin Island Minerals - Brad Wilson

Brad Wilson, mineral adventuring solo along the southern coast of Baffin Island
B. Wilson photo

There is only limited literature and information about the geology and mineralogy of this region, so Brad has developed much of his knowledge from his travels. His discoveries have included superbly crystallized black spinel crystals, along with various minerals one might also find in calcite vein-dyke environments, such as titanite (to large-sized crystals).

Spinel with diopside, MacDonald Island, Nunavut, Canada

Superb, complex spinel crystals with diopside, MacDonald Island, Nunavut, Canada – 7.5 cm
B. Wilson specimen and photo

Many of Brad’s finds to date have been indicative of enticing potential… what a colour…

Spinel, Baffin Island, Nunavut, Canada

Spinel (intense blue), Baffin Island, Nunavut, Canada
B. Wilson photo

Brad plans to continue to travel to Baffin in the future, and he hopes to bring back more amazing specimens – without any more polar bear encounters.

Changing gears entirely, Friday morning’s talks were about uranium minerals.

Dr. Peter Burns, is the current president of the IMA (International Mineralogical Association), Director of the Center for Sustainable Energy at University of Notre Dame, director of an energy frontier research centre, Materials Science of Actinides and a professor in several disciplines at Notre Dame. Upon reading that in the program, I wasn’t sure I’d be able to understand anything. How wrong I was to wonder! “The Societal Importance of Uranium Minerals and Mineral-Inspired Materials” explained many things about which I knew nothing, including uranium mineral structure. The compounds that combine in uranium minerals are limited by the unusual large size of the UO2 molecule. This molecule only combines with certain others in certain ways and this limits the diversity of uranium mineral compositions. We were treated to photographs of uranium minerals few of us find familiar.

Ewingite – Mg8Ca8(UO2)24(CO3)30O4(OH)12(H2O)138  – is a newly-described mineral from the Czech Republic, and its structure contains the largest cluster known in a mineral, at about 2.4 nm across with 24 U atoms per cluster.

Ewingite

Ewingite, Plavno Mine, Plavno, Krušné Hory Mts (Erzgebirge) Bohemia, Czech Republic.
Field of view 1 mm. Travis Olds photo.

Leoszilardite

Leoszilardite, Markey Mine, Red Canyon, White Canyon District, San Juan Co., Utah, USA
Field of view 1.5 mm. Travis Olds photo.

Gauthierite

Gauthierite, Shinkolobwe Mine, Shinkolobwe, Katanga Copper Crescent, Katanga, Democratic Republic of Congo
Field of view 1.2 mm. Travis Olds photo.

We also learned that the study of uranium mineral structures and uranium compounds is producing results that may lead to significant new applications. One particularly interesting example is the manipulation of actinide (including uranium) cluster structures and creation of compound structures that may be used in uranium reprocessing, to recover uranium from spent fuel at nuclear facilities.

Next, Dr. Robert Lauf spoke on the Mineralogy of Uranium and Thorium. You likely know he is a well-known author of books on specimen mineralogy (the Collector’s Guide series).  His presentation included explanations and many mineral photographs, excellent specimens in stunning colours, and some rather uncommon minerals.

Francevillite

 Francevillite, Mounana Mine, Franceville, Haut-Ogooué Province, Gabon – 4 cm
R. Lauf specimen and photo

The minerals were discussed with emphasis on different groups and structures. If this area is of interest to you, you might like to know that he has just published a new book, “Introduction to Radioactive Minerals”. (Please see the link below, under Links)

Torbernite

Torbernite, Margabal Mine, Entraygues-sur-Truyère, Aveyron, Midi-Pyrénées, France
R. Lauf specimen and photo

Gummite(1)

Gummite(2)Radiograph

 

 

 

 

 

 

 

 

 Gummite and uraninite, Ruggles Mine, Grafton,
Grafton Co., New Hampshire, USA.
Visible light (left) and radiograph, exposed 8 hours (right).
R. Lauf specimen and photos

Friday night, John Koivula presented “Crystalline Showcases”. John is a renowned photographer of micro features of gemstones, particularly inclusions – he has been active for fifty years, with over 800 published articles and notes.

Needless to say, the photographic journey over the course of this talk included many amazing images. Wild!

KoivulaCassiterite Cross-section through a Bolivian cassiterite showing fine growth. Field of view 2 cm (!)
J. Koivula specimen and photo

Axinite - (Fe) in Quartz, New Melones Lake, Calaveras County, California, USA

Axinite – (Fe) inside Quartz, New Melones Lake, Calaveras County, California, USA
Field of view 0.9 cm. J. Koivula specimen and photo.

Technical Session

On Friday afternoon of the Symposium each year, Dr. Carl Francis moderates our technical session, “Contributed Papers in Specimen Mineralogy”. This is a packed afternoon, with talks strictly limited to 15 minutes. Abstracts from these talks are included in the Symposium program notes (link below), and they will also be published during the year in Rocks and Minerals magazine, so keep an eye out for them!

Saturday – Annual What’s New

After a second late night of folks having fun with mineral friends, one might expect a thinner crowd for the first talk Saturday morning… but Jeff Scovil leads off Saturday morning with What’s New in Minerals, so it’s a full house.

Not only is Jeff the world’s most published mineral photographer, but because he spends the year travelling the world to shoot some of the best mineral specimens there are, he is in a unique position to share. Jeff’s annual What’s New in Minerals each year at Rochester is a spectacular presentation not to be missed.

Copper, Bou Nahas, Oumjrane, Alnif, Er Rachidia, Morocco

Copper, Bou Nahas, Alnif, Er Rachidia, Morocco – 2.9 cm wide.
Spirifer Minerals specimen, J. Scovil photo.

Vivianite, Huanuni Mine, Bolivia
Vivianite. Huanuni mine, Potosi Dept., Bolivia – 12 cm.
Unique Minerals specimen, J. Scovil photo.

Kunzite, Mawi pegmatite, Nuristan, Afghanistan

Spodumene var. kunzite. Mawi pegmatite Nuristan Prov., Afghanistan. 9.8 cm high.
Shafiee Muhammad specimen, J. Scovil photo.

Crocoite, Red Lead Mine, Tasmania

Crocoite. Red Lead mine, Dundas, Tasmania, Australia – 9.3 cm.
Keith & Mauna Proctor specimen, J. Scovil photo.

Elbaite Tourmaline, Cruzeiro Mine, Minas Gerais, Brazil

Elbaite, Cruzeiro Mine, Sao Jose da Safira, Minas Gerais, Brazil – 15.1 cm.
Wayne Sorensen specimen, J. Scovil photo.

This is only a small taste of Jeff’s What’s New in Minerals presentation – it was an hour of photos like this! Each year, people hyperventilate, pass out on the floor and all that. (Ok, maybe they don’t really, but literally there are gasps, oohs and ahhs…)

All of Saturday morning is dedicated to what has been new in the past year in minerals. After Jeff, we have What’s New II, with other short contributions about finds and developments from Mineral World over the past year.

Since I am now spending a lot of time in a year pursuing minerals and then photographing them in a dark room, I included a few in a brief presentation. If you have been following along with the website over the past year, you’ll already be familiar with many of the specimens I included in my talk so I won’t belabour them here, but I’ll include three stories in case you missed any of them – two are not only cool but clarify the correct labeling for many incorrectly labelled specimens (and I’m including the third simply because it’s gorgeous).

Vibrant specimens from the Luputo Mine in the Democratic Republic of the Congo were initially labelled as chrysocolla when they first came out in early 2015. Subsequently, a posting on mindat by a mineral dealer, citing a vary authoritative source, labelled them ajoite.  Labels all over the place were changed, to accord with the work done by the authoritative source. In fact, that person’s work was improperly represented. In completing the work subsequently, it was confirmed that they are in fact chrysocolla. They are chrysocolla pseudomorphs after malachite, after azurite, and they are covered with tiny pseudomorphs of chrysocolla after malachite.

Chrysocolla, Luputo Mine, Lubumbashi, Democratic Republic of the Congo

Chrysocolla pseudomorph after malachite after azurite, Luputo Mine,
Lubumbashi, Democratic Republic of the Congo – 8.1 cm

Another find from 2015 was the subject of more comprehensive identification work – the very cool pseudomorphs after marcasite and pyrite from the White Desert in Egypt. These were first offered on the mineral market in the mid-1990s, and have been brought out sporadically since then. They have repeatedly been labeled “hematite” (I can’t say on what basis, since the high-tech test I conducted with a streak plate does not produce a hematite result). Some have also been labeled goethite and others “limonite”(the latter no longer a valid mineral species name, but is a term still used in reference to unidentified iron hydroxides, so its past use has not been technically incorrect). In any event, recent substantial work by Hannah Allen at Hamilton College has confirmed that the White Desert pseudomorphs are predominantly goethite.

Goethite pseudomorph after marcasite, White Desert, north of Farafra Oasis, New Valley Governorate, Egypt

Goethite pseudomorph after Marcasite, White Desert, North of Farafra Oasis,
New Valley Governorate, Egypt – 3.6 cm
 

A new find at the El Hammam Mine this past year produced striking beautiful, glassy, yellow fluorite specimens. El Hammam is not known for yellow fluorite, rather it is most known for fluorite in hues of green, with associated dustings of pyrite.

Fluorite, El Hammam Mine, Meknes, Meknes-Tafilalet Region, Morocco

 Fluorite, El Hammam Mine, Meknes, Meknes-Tafilalet Region, Morocco
Field of view – 4.0 cm

An Unfortunate Development

Unfortunately, not all of What’s New is good news.

A piece of highly disappointing (the polite way to say it) news from Mineral World was presented by Frank Melanson. One of Canada’s most famous mineral collecting localities is finished. The Bear Lake diggings, in Highlands East, Haliburton Co., Ontario was a location for superb crystals of titanite, fluorapatite, phlogopite, orthoclase and amphibole minerals, along with many other minerals. Bear Lake was the type locality for the black amphibole now classified as ferri-fluoro-katophorite. An important part of Canada’s mineral heritage, thousands of people collected there, many as children, and many were inspired by Bear Lake to become more interested in mineral collecting. The locality was maintained, with significant help from the local collecting community, as a collecting site by the Bancroft and District Chamber of Commerce. We have learned that the Chamber of Commerce sold the property to a new private owner who prohibits any collecting. No-one in the collecting community had any word of this until it was a done deal, so there was no opportunity to save Bear Lake. The technical term of art for this kind of mineral locality development: it bites. Totally.

In case you are not familiar with Bear Lake minerals, here are a couple of of the many specimens I collected there over the years:

Ferri-Fluoro-Katophorite, Bear Lake, Highlands East, Haliburton Co., Ontario, Canada
Ferri-Fluoro-Katophorite, Bear Lake, Highlands East, Haliburton Co., Ontario, Canada – 6.8 cm
R. McDougall specimen.

Titanite, Bear Lake, Highlands East, Haliburton Co., Ontario, Canada

Titanite, Bear Lake, Highlands East, Haliburton Co., Ontario, Canada – 5 cm
R. McDougall specimen

More Saturday Presentations

Saturday afternoon began with Dr. Robert Martin, professor emeritus in the Department of Earth and Planetary Sciences at McGill University, and past editor of the Canadian Mineralogist – a role he undertook for 35 years (!).

As a small aside… once upon a time (a surprising number of years ago, now) there was a young history major starting at McGill. He was told by the university registrar that because his major was in the Faculty of Arts, the mineralogy course taught by Professor Martin was too hard and simply wasn’t for him. He took it anyway. Bob Martin taught me a lot about mineralogy during my time at McGill. I’ve always been grateful to have had that opportunity, and today I remember more of what he taught me than any of the history and other subjects I studied during those years.

Saturday afternoon, Bob presented The Minerals and Mineralogists of France. (Alas, no Bordeaux was served to accompany the talk.) This presentation was based upon Bob’s upcoming book, Canadian Mineralogist Special Publication 13 – Minerals Having a French Connection. It was a great talk that highlighted some lesser known minerals, locality photos and fascinating histories. For example, I was struck by some history about aerinite.

 Aerinite, northern Spain
Aerinite, Estopanyà, Catalunya, Spain – 7 cm
R. Martin specimen, Russell Proulx photo.

This is a rare, complex carbonate-bearing silicate of a strong blue colour, from which it derives its name (named after the Greek aerinos, for sky-blue). The colour was so valued that, even though aerinite was not available in great supply, it was used in pigments in Romanesque paintings and frescoes in chapels along the Pyrenees. A truly barbaric thing to do to a rare mineral, but anyway…

 AeriniteRomanesque

Aerinite, used as a pigment by several Romanesque master painters. It is the blue of the Pantocrator from the apse of Sant Climent de Taüll church (early 12th century). This Romanesque fresco is now on display at the Museu Nacional d’Art de Catalunya in Barcelona.

I think everyone was wowed by the photos (from the upcoming book) of the rare mineral, tubulite. Tubulite was discovered at Le Rivet quarry, Peyrebrune ore field (Tarn), 6 km east-southeast of Réalmont, France. I’m including them both – is this a cool mineral or what? (Great photos!)

Tubulite1

Tubulite, Rivet quarry, Peyrebrune ore field, Tarn, France – 0.4 mm
Robert Pecorini collection, Jean-Marc Johannet photo

Tubulite2

 Tubulite, Rivet quarry, Peyrebrune ore field, Tarn, France
Field of view 2 mm
Robert Pecorini collection, Jean-Marc Johannet photo

For our second Saturday afternoon talk, Elise Skawold, graduate gemologist (GG) and Fellow of the Gemological Association of Great Britain (F.G.A), presented “From Gemology to Mineral Physics and Back Again”. This talk provided a completely accessible glimpse into the realm of some rather high-level mineral physics applied to solve mineralogical mysteries. (The work featured in this presentation was done with Bill Bassett, Steve Jacobsen and John Koivula.) The central question in this particular mystery was the identification of an inclusion in a diamond crystal. One possibility was that the inclusion might be ringwoodite. Addressing the issue necessitated trips to various labs for different kinds of analyses.

Ringwoodite is not a mineral seen in mineral collections. It is a polymorph of forsterite, which is able to contain hydroxide within its structure.  It is stable only at high pressure, such as in the Earth’s upper mantle, at depths from the surface between 400 km and 650 km. It is actually thought to be a highly abundant mineral in this zone of the mantle, but because it is not stable at the prevailing pressure at the Earth’s surface, finds of naturally-occurring ringwoodite is incredibly rare (sometimes found in meteorites). Ringwoodite is known in an inclusion in one Brazilian diamond – it was trapped in the diamond deep in the Earth and then blasted up from the depths during a diatreme explosion. The reason ringwoodite is of such interest is that the presence of ringwoodite in the mantle in such abundance is thought to indicate large amounts of  water at depth (in the form of hydroxide) , below the Earth’s surface. Researchers are keen to find more ringwoodite inclusions in diamonds to help us to learn all we can about the water that may be harboured in the mantle.

In the end, this inclusion was determined to be forsterite.

Sunday – A Truly Grand Finale

Sunday morning’s program this year was special.

In some past years, by Sunday morning, the numbers have thinned a little. Survivors of three late nights of fun are few, and so we have sometimes seen smaller numbers Sunday morning. (You may be noticing a theme about late nights…) However, at recent Symposia, this has not been the trend – and this particular Sunday, the room was packed!

First up was a superb talk on the Vermont asbestos quarries at Belvidere Mountain (often erroneously referred to as “Eden Mills”, a town that isn’t the nearest and certainly isn’t at the locality). Ken Carlsen and Dr. Woodrow Thompson presented a history, explanation and mineralogy that was thorough and fascinating – I don’t know where the hour went (!). This presentation expanded upon their excellent article in the November-December 2015 issue of Rocks and Minerals magazine, “Belvidere Mountain Asbestos Quarries, Lowell/Eden, Vermont”. (If you haven’t yet red this article, it’s a great one – I highly recommend it!)

The earliest  history was pieced together through some detective work and some great old photographs, including these two:

Lowell, Vermont

Lowell, Vermont, circa 1909. This settlement was originally known as “Chrysotile.”

Vermont Gallagher Mine Pit

The early Gallagher Mine at Belvidere Mountain, Vermont, circa 1909

There were also great photos from a more contemporary period, including some showing the pit areas where fine specimens were found at various times.

Belvidere Mtn

1980 photo of the mines, Belvidere Mountain, Vermont
State of Vermont Archives photo

The full photographic tour of the minerals of Belvidere Mountain is in the Rocks and Minerals article – here are a couple of teasers:

Vermont Grossular

Grossular on diopside, Lowell quarry, Lowell, Vermont, Collected in the 1950s – 3.5 cm wide
Ken Carlsen specimen, J. Scovil photo.

Vermont Vesuvianite

Vesuvianite, Lowell Quarry, Lowell, Vermont – 2.5 cm
Ken Carlsen specimen, J. Scovil photo.

And last, but absolutely not least, the final talk of the 43rd Rochester Mineralogical Symposium was one that will always be remembered.

Our speaker was Canadian mineral photographer Michael Bainbridge. He is wrapping up the end of a major project with the Canadian Museum of Nature, a book on the truly unbelievable mineral collection assembled by Bill Pinch from the beginning of his collecting career and through the late 1980s, acquired by the Museum.

From the beginning of his collecting days, through to the late 1980s, Bill built a mineral collection like no other. It had incredible breadth of species, and top specimens of so many – many best of species. John White, former curator at the Smithsonian, has stated that Bill’s was the best private collection ever assembled. Many feel the same way. The Pinch Collection includes jaw-dropping specimens, one after another, after another… like this one…

Size

Wakabayashilite, White Caps mine, Manhattan, Nye County, Nevada, USA – 13 cm (!)
Bill Pinch Collection, now in the Canadian Museum of Nature.
M. Bainbridge photo.

And, given the material itself, it would have been a relatively straightforward undertaking to present a slideshow of highlights among the great specimens from Bill’s first collection. (Bill has been assembling another collection ever since…) However, although many of those highlights were of course included in the photographs accompanying the talk, Michael took a different, deeper approach, presenting stories of assembling the collection, surrounding the thesis that Bill, and the Pinch Collection, redefined mineral collecting and mineral appreciation at the time, and for all who followed.

Michael placed this story in the context of the era, the dynamics, and the influential players at the time, notably Paul Desautels. During the time period in which Bill built the collection, mineral specimens and collections came to be appreciated differently than they had in the past, and Michael highlighted Bill’s influence and the influence of Paul Desautels. The world of mineral collecting was forever changed during this era, and Bill’s role was fundamental. I don’t want to spoil the stories or the specimens for you – the book will be out soon and it will be an essential addition to mineral libraries worldwide.

Size

 Hauerite, Radussa, Italy – largest crystal 5 cm, largest octahedron 3.5 cm
Bill Pinch Collection, now in the Canadian Museum of Nature.
M. Bainbridge photo.

Bill has always been the keenest observer of minerals, and the emphasis in his collections has been on both (1) the best, and (2) specimens with significance in mineralogy.

2cm wide

 Rosasite, Tsumeb Mine, Tsumeb, Namibia – 2 cm
Bill Pinch Collection, now in the Canadian Museum of Nature.
M. Bainbridge photo.

As life would have it, Bill had not been present at the Symposium for many years. It is no exaggeration to say that it was a moving morning, as Bill, his wife Jackie and their son Michael attended the talk. They were greeted with the warmth that has come to be part of the Symposium – the Symposium that Bill himself has had such a major hand in creating and contributing to, over the years.

Bill

Bill Pinch, doing what he loves – carefully examining a mineral specimen and seeing something unusual
(often something no-one else sees at first!)

The book, The William W. Pinch Collection, will be published by Lithographie LLC and is expected to be 2017 – can’t wait!

Displays

As happens every year at Rochester, the Exhibit Room was full of great cases and beautiful minerals, some from individual collectors and some from museums.

The New York State Museum always has a great display. This year, the case was dedicated to the late Charles F. Hiler – the Museum recently acquired his collection. Chuck was a regular member of our Rochester Symposium family and will be missed. He specialized in the minerals of the Lockport dolostones of the region, and the case featured some superb specimens from the Penfield Quarry, just east of Rochester. Here are a couple:

Fluorite, Penfield Quarry, New York

Fluorite, Penfield Quarry, Penfield, Monroe Co.,  New York – crystal approx. 4 cm

Gypsum, var. selenite, Penfield Quarry, New York

 Gypsum, var. selenite, Penfield Quarry, Penfield, Monroe Co., New York – approx. 6 cm

Maine Mineral and Gem Museum Case, Rochester Mineralogical Symposium

Maine Mineral and Gem Museum case, Minerals Mined by Frank Perham

Maine Mineral and Gem Museum Case, Rochester Mineralogical Symposium

 The schorl specimen in this case, collected in 1958, was particularly sharp – a great piece –

PerhamSchorl Schorl, Nubble Quarry, Greenwood, Maine
Crystal approximately 4 cm

The Cincinnati Museum of Natural History and Science had a great case of geodes from the midwest, with some particularly fine Indiana specimens from the collections of Terry Huizing and Gene Tribbey. This is a gorgeous golden barite in a geode:

GeodeBarite

Barite, Monroe Co., Indiana, crystal approximately 4 cm

John Betts put together a case of beautiful specimens from his collection:

John Betts Mineral Collection Display Case, Rochester Symposium 2016

 

George Thompson’s case this year was dedicated to amethyst and associated minerals from the Thunder Bay District in northern Ontario:

GeorgeThompsonCase

 

George included pieces from small find a few years ago that produced sharp, glassy, pale green fluorite crystals on hematite-included amethyst – these are excellent, colourful specimens (more so, in better light!):

Amethyst-Fluorite

 

David Joyce had a great case of Canadian minerals, including a spectacular one from a new find in British Columbia – quartz crystals with amethyst sceptres. The sceptres have glassy, lustrous faces, even though that doesn’t come through in this photo. An amazing specimen!

DaveAmethyst

Quartz, var. Amethyst, Sanca Creek, Kootenay Lake, British Columbia, Canada – approximately 10 cm

The Rest of the Fun

As much as anything on the official program, lots of the fun occurs throughout the weekend as we all have a chance to socialize in the halls, over meals, and especially on the 4th Floor. This is the floor on which all of the dealers are set up – it is only open when the program is not on, but of course activities on the 4th Floor continue into past midnight and into the morning hours. It’s been a while since the 4th floor has seen Topaz Bowling (which apparently was not popular with all guests), but other fun continues…

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An annual highlight is the Saturday night mineral song session with David Joyce.
John Betts photo.

By now I assume you all know Dave has a CD of mineral collecting and mining tunes… if you are not yet familiar with these them, they are popular collecting trip and mineral show fare.  And if you aren’t sure what I mean by mineral collecting and mining tunes, you can check them out on his website at the link below. (Have an online listen to song # 9, The Mineral Dealer). By now, many of us know all the words, so Saturday night at Rochester is like a large campfire singalong. Except that it’s on the 4th Floor of the Radisson Rochester Airport Hotel, where fires aren’t welcome.

Until Next Year…

The Rochester Symposium is a great event. It has a rich history over its first 43 years, and it has seen many of Mineral World’s most prominent names as contributors. At the same time, the Symposium continues to embrace contributions from all levels in mineral collecting – it simply would not be what it is without everyone who contributes.

Of course, the Symposium could literally not happen without the dedicated efforts of the team who put it together – countless thanks to Steve Chamberlain (chair), Helen Chamberlain (registrar), and many others on the committee and those helping at the event and in the background, including Dan Imel, Carl Francis, Bruce Gaber, Brian McGrath, Bob Morgan, Betty Fetter, George and Susan Robinson, Quintin Wight, Elizabeth Von Bacho and Tom White. I hope I haven’t missed anyone!

And thank you to all of the speakers and photographers from this year, for all of your help with photos to share through this report

2017 RMS Speakers:

We have a super group of speakers to look forward to at the next RMS (except that very last guy might be a bit of a dud):

John Cornish, Frank Hawthorne, Bob Lauf, Renato Pagano, Herwig Pelckmans, Les Presmyk, Jolyon Ralph, Jeff Scovil, and me.

Links

If you are seeking links for anything mentioned above, some of these may be of interest:

The 43rd Rochester Mineralogical Symposium – Program Notes – April 14-17, 2016

Brad Wilson’s gemstones, including cut stones from Baffin Island, are here.

The new book by Robert J. Lauf: Mineralogy of Uranium and Thorium

The new Canadian Mineralogist Special Publication 13, Minerals Having a French Connection, is expected to be published in early 2017. It will be available from the Mineralogical Association of Canada’s bookstore.

Our amazing professional mineral photographers (who – of course – take photos of private collection specimens for individual collectors): Jeff Scovil and Michael Bainbridge 

David K. Joyce has written – and plays and sings, of course – the soundtrack for so many great times in minerals. The tunes are available on itunes and the CD is available from Dave – if you’d like to hear them, here is the page where you can listen.

Posted by: Raymond McDougall on 05.10.2014 | Filed under: Latest, Recent Mineral Updates | Comments (0)

This Magnesiofoitite Tourmaline Update features crystals of magnesiofoitite that are simply amazing for the species. These crystals are from a large collapsed pocket in Tsitondroina Commune, in the Ikalamavony District, Matsiatra Region, Fianarantsoa Province, Madagascar. Sharp and lustrous, with somewhat varied crystal habits, these crystals comprise a remarkable find.

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Magnesiofoitite, Tsitondroina, Fianarantsoa, Madagascar – 5.8 cm.

Posted by: Raymond McDougall on 03.21.2014 | Filed under: Latest, Recent Mineral Updates | Comments (0)

This Dravite Tourmaline Update is a group of super crystals from Serra Branca, Rio Grande do Norte – an older find just coming to light for the first time. Sharp and lustrous, these crystals show textbook form and many look like crystal models.

Posted by: Raymond McDougall on 03.13.2014 | Filed under: Latest, Mineral Shows | Comments (0)

Cactus

Urban Field Collecting

Each year when “Tucson” nears, I’m like a kid who can’t wait to race downstairs on Christmas morning. Just the chance to experience the sprawling mineral shows all over the city (known collectively in Mineral World simply as “Tucson”)… there is so much to see and we all come away with different impressions.

This is just a brief blog post about a few favourite finds from Tucson 2014 that you might find interesting. I’m also including a few words below about Bisbee and the great little museum there, but not before Tucson (!).

I have been travelling to Tucson with my collecting partner David Joyce every year for a long time now. Finding what we’re after can be tough! We embark on excursions involving long trekking, backpacks, headlamps, loupes… sledge hammers and drills… Ok, ok, no sledges and drills. But it’s still urban field collecting. We work through a lot of rock in hopes of finding something great – and eventually we do.

The Music

Before I get to mineral specimens, I’ll start with something that was entirely new to Mineral World. Dave premiered his new CD – Nuggets and High Grade: The Mining and Mineral Collecting Songs of David K. Joyce. So, it was no ordinary Tucson. The guitar, the fans, the autographs, the crowd control barriers, the police escorts… (or something like that, anyway…)

Dave played small gigs around Tucson, including a great evening of Krupnik and Kielbasa hosted of course by Spirifer Minerals, and wine and cheese hosted by Dave Bunk Minerals up at the Westward Look show.

Music

The songs and instrumentals were played around the show, including at the Main Show – and they could be heard on sound systems coming from dealers’ rooms as you walked by. Light-hearted with good laughs, these are songs for mineral collectors. (If you haven’t heard Damn The Glaciers or The Mineral Dealer, you haven’t lived.) I feel safe predicting that many of these songs will be played live during the Rochester Mineralogical Symposium, if you’d like to sing along in person. In the meantime, they are available on CD and downloadable from iTunes. If you have not yet heard these tunes, check them out here.

The Minerals

Moving on from the Rock Star to the rocks themselves… here are a few of the mineral finds I thought were special. (Some are new, and some are minerals that have debuted before now, where the prices, quality, or quantity have really improved.)  Specimens from all of these finds will be available on our website in the coming weeks.

China remains at the forefront for new and interesting mineral specimens.

There are amazing new calcite specimens from Chenzhou Prefecture, Hunan Province, China (specifics on locality were not freely forthcoming as yet – if you know more I’d love to hear from you (email or here).  These are comprised of first generation scalenohedral crystals capped by second generation flattened calcite crystals, giving wonderful aesthetic form, including even an almost mushroom-like appearance.  Unfortunately most that I saw from this find were damaged, but I managed to find a few that were in super shape. These are very cool specimens!

Calcite, China

Calcite, Chenzhou Prefecture, Hunan Province, China – 4.1 cm

Another interesting new one was a find of beautifully twinned cerussite at the famous Daoping Mine, Gongcheng Co., Guilin Prefecture, Guangxi Zhuang Autonomous Region, China, which is most famous for pyromorphite. Although nice specimens of blocky yellow cerussite crystals were found a few years ago at the locality, these ones are distinctly different – they are flattened, twinned and nicely coloured. I only acquired one (photographed below), because for the most part prices were high for what they are, and I saw only a very few that were high enough quality. Nonetheless there may be a few others around so keep your eyes open for them. I only saw them with the one dealer in Tucson – who knows if there could be more?

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 Cerussite from the Daoping Mine, Gongcheng Co., Guilin Prefecture, Guangxi Zhuang Autonomous Region, China – 3.1 cm

The latest specimens of chalcopyrite on siderite from Kaiwu, Hezhang County, Ghizou Province, China, are higher quality than most that have been coming out in the past, with sharp chalcopyrites and a new twist on a couple, which include tennantite (confirmed by post-Tucson analysis).  When these were first coming out, so many were badly damaged, and even so, they were incredibly expensive.

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 Chalcopyrite and Siderite from Kaiwu, Hezhang County, Ghizou Province, China – 9.6 cm

The Huangguang mines in Inner Mongolia have continued to produce some wonderful mineral specimens. Many prices asked are still beyond the reach of mere mortals… but with some serious searching, fine specimens of several minerals were obtainable, including sharp ilvaites, some lollingites (most are still pricey) and others. What a great contemporary mineral producing region!

 Inner Mongolia

 Jewel-like Fluorite among dark-tipped sceptered Quartz, Huangguang Mines, Inner Mongolia, China – 5.3 cm

Moving on to the other world famous deposit with some strikingly similar mineralogy to the Huangguang Mines, some fine specimens continue to come from Dalnegorsk, Russia.  In particular, there were some nice fluorite crystals. There were also really neat quartz crystals with overgrowths of beta quartz, and also a few tabular-style pyrrhotites. 

DalFluoriteFluorite, Dalnegorsk, Russia – 5 cm

Coming further west, the famed type locality for  dioptase at Altyn-Tyube in the Kirghiz Steppes, Karagandy Province, Kazakhstan is producing some beautiful specimens and operations continue, with hopes of more in the future. A couple of  gorgeous ones are here.

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New Dioptase from Altyn-Tyube in the Kirghiz Steppes, Karagandy Province, Kazakhstan – 12 cm

A truly new find was the pocket of wonderful black tourmalines found at Tsitondroina, Fianarantsoa, Madagascar – they are magnesiofoitite. The crystallography on these is pretty amazing. I acquired the best of them and they will be posted on the site soon.

Madagascar

Magnesiofoitite Tourmaline from Tsitondroina, Fianarantsoa, Madagascar – 6.5 cm

And the last one for now – some really great datolite crystals have recently been found at Charcas, Mun de Charcas, San Luis Potosí, Mexico. The datolite crystals can reach several centimetres across and range from pale green to pale blue. Some of the datolite crystals show a preferential crystallization habit, with highlighted white faces representing certain crystal forms. A number of the datolite specimens are accompanied by sulfide mineralization – primarily pyrite and chalcopyrite, crystals of which even occur fully included within datolite crystals.

DatoliteDatolite from  Charcas, Mun de Charcas, San Luis Potosí, Mexico – 7 cm

 

Where Minerals Go to Die

Just as an aside, have you ever wondered where minerals go to die? During real field collecting, the answer is usually the mine dumps. But what happens in the context  of urban field collecting?

There are places in Tucson where mineral specimens are thrown on top of each other, piled, crunched, maybe bathed in oil, bleached under the intense Arizona sun…

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Imagine a fine mineral specimen surviving this mayhem  (not sure why we need the pretext of boxes here)

Urban Field Collecting Can Wipe a Guy Out 

davsnzHard-working mineral dealer David K. Joyce, “power-napping” in the middle of the courtyard at the height of the busy Tucson City Centre Inn Suites Hotel Show.

(Dave likes to call it “power-napping.”  Possibly because it sounds more productive than “snoozing on the grass.”)

World Famous Bisbee

Although I could look at minerals all day every day an never tire of it, there’s something attractive to a change of pace and scenery, so we headed to Bisbee. The trip to Bisbee leads through Tombstone, famous in its own right as one of the roughest towns of the American Old West, best known for the gunfight at the O.K. Corral. Many of the lives of the early inhabitants of Tombstone ended prematurely.

boothillCemetery at Boot Hill, Tombstone

(Interesting about the name “Boot Hill”: This name was commonly given to cemeteries in the American Old West and was derived from the notion that this was where the gunfighters – the people who died with their boots on – were buried.  The Cemetery at Boot Hill, Tombstone was not limited to gunfighters.)

If you’ve never done the day-trip from Tucson to Bisbee, it’s worth it.

Headframe

Headframe at Bisbee

Of course Bisbee is best known among mineral collectors for its historic copper mines, which  are among the United States’ most prolific mineral specimen localities (325 different minerals have been found at Bisbee).  The old mining operations feature prominently on the modern landscape of the Bisbee area.

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 The Sacramento Pit and Lavender Pit are the large (inactive) open pit mines at Bisbee

Bisbee itself is a neat town with lots of older buildings, artists’ studios and shops.  But (as you might guess) the highlight of the visit for me was the Bisbee Mining and Historical Museum. This little museum is so well done!  A member of the Smithsonian Institution’s Affiliation Program, the displays were designed with the Smithsonian’s assistance. They are fascinating, informative and easy to walk through for however long (or not) you might want to stay. The museum is housed in the building that was once the corporate headquarters of the Copper Queen Consolidated Mining Company (eventually purchased by Phelps Dodge Corporation, which was subsequently acquired by Freeport McMoRan Copper and Gold Inc.) – it is a beautifully preserved building and a National Registered Landmark.

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The upper floor of the museum’s displays includes underground mine scenes and some mineral specimens from various collections:

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Gibbsite stalactite with Malachite and Azurite on Goethite from the Copper Queen Mine – approx. 15 cm
(James Douglas Collection, Smithsonian Institution Collection)

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Calcite on Malachite from the Copper Queen Mine – approx. 12 cm
(James Douglas Collection, Smithsonian Institution Collection)

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Malachite pseudomorph after Azurite from the Holbrook Mine – approx. 15 cm
(M.J. Cunningham Collection, Bank of America)

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Gorgeous Cuprite from the Czar Mine – approx. 10 cm – largest crystal perhaps 1.2 cm
(M.J. Cunningham Collection, Bank of America)

I stumbled out of the museum, as those unforgettable red cubes were making my head swim!  Nice way to end the day in Bisbee.

Back in Tucson, it was time to wrap and pack specimens for shipment! We had a few last fine meals with mineral and mining friends before saying goodbye and heading back to the Great White North.

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