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Posted by: Raymond McDougall on 01.21.2020 | Filed under: Latest, Recent Mineral Updates | Comments (0)

 

I’ve posted the fourth in a series of updates with superb specimens from John S. White’s collection (click here).

Most of you will likely know a bit about John, given that among his many accomplishments in the mineral world he is the founder of the Mineralogical Record, former curator of the U.S. National Mineral and Gem Collection at the Smithsonian Institution and author of two books and over 200 articles. I’ve written a short post about him with some great photos – hope you enjoy it! (click here) .

Spodumene, var. Kunzite, Urucum Mine, Galileia, Minas Gerais, Brazil

Spodumene, var. Kunzite, Urucum Mine, Galileia, Minas Gerais, Brazil – 7.7 cm

Stibnite and Calcite, Tongren Prefecture, Guizhou, China

Stibnite and Calcite, Tongren Prefecture, Guizhou, China – 6.5 cm

Elbaite Tourmaline, Albite, Stak Nala, Gilgit-Skardu Road, Northern Areas, Pakistan

Elbaite Tourmaline, Albite, Stak Nala, Gilgit-Skardu Road, Northern Areas, Pakistan
Field of view 5.0 cm

Prehnite, Calcite, Upper New Street Quarry, Paterson, Passaic Co., New Jersey, USA

Prehnite, Calcite, Upper New Street Quarry, Paterson, Passaic Co., New Jersey, US – 9.8 cm

Prehnite, Merelani Hills, Lelatima Mountains, Manyara, Tanzania

Prehnite, Merelani Hills, Lelatima Mountains, Manyara, Tanzania – 5.0 cm

Prehnite, Merelani Hills, Lelatima Mountains, Manyara, Tanzania

Prehnite, Merelani Hills, Lelatima Mountains, Manyara, Tanzania – 3.6 cm

Rutile and Hematite in Quartz, Novo Horizonte, Bahia, Brazil

Rutile epitactic on hematite in quartz, Novo Horizonte, Bahia, Brazil
Field of view 1.6 cm

Spessartine Garnet, Quartz. Tongbei, Yunxiao Co., Fujian Province, China

Spessartine Garnet with smoky quartz and opal, Tongbei, Yunxiao Co., Fujian Province, China
Field of view 4.0 cm

Sphalerite, Quartz, Madan Ore Field, Rhodope Mountains, Smolyan Oblast, Bulgaria

Sphalerite with quartz, Madan Ore Field, Rhodope Mountains, Smolyan Oblast, Bulgaria
Field of view  5.0 cm
Stellerite, Maharashtra, India

Stellerite, Maharashtra, India – 7.7 cm

Vanadinite, Mibladen Mining District, Midelt, Khenifra, MoroccoVanadinite, Mibladen Mining District, Midelt, Khenifra, Morocco – 4.4 cm

Jeffrey Mine, Asbestos, Estrie, Quebec, Canada

 Jeffrey Mine, Asbestos, Estrie, Quebec, Canada

Wulfenite, Ahumada Mine, Los Lamentos Mtns., Chihuahua, Mexico

Wulfenite, Ahumada Mine, Los Lamentos Mtns., Chihuahua, Mexico – 8.5 cm

Wurtzite, epitactic Sphalerite, Merelani Hills, Lelatima Mountains, Manyara, Tanzania

Wurtzite, epitactic Sphalerite, Merelani Hills, Lelatima Mountains, Manyara, Tanzania – 1.6 cm

Posted by: Raymond McDougall on 11.15.2015 | Filed under: Latest, Recent Mineral Updates | Comments (0)

 

I’ve posted a new Brazil Update (click here), with superb, diverse specimens.

From the world famous morganite finds at the Urucum Mine, this crystal is likely from the 1973 pocket.

Beryl, var. Morganite, Urucum Mine,  Galileia, Minas Gerais, BrazillBeryl, var. Morganite, Urucum Mine, Galileia, Minas Gerais, Brazil – 7.9 cm

A one-of-a-kind specimen, this aqua-colours montebrasite crystal was found in a pocket in the 1970s. Most of the pocket material was etched and did not exhibit crystal faces.

Montebrasite, Lavra da Ilha, Taquaral, Itinga, Minas Gerais, BrazilMontebrasite, Lavra da Ilha, Taquaral, Itinga, Minas Gerais, Brazil – 3.9 cm

From a new recent find, a small pocket at Novo Horizonte produced a small number of remarkable crystals, sold to me under the label “synchysite”. Subsequent analysis by Don Doell has confirmed more about their identity. Having conducted semi-quantitative EDS at SGS Labs, Don found that these are in fact phosphate mineralization, and 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. They could also be after bastnasite-(La), which has been described from the locality. 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!

Synchysite, Novo Horizonte, Bahia, BrazilRhabdophane pseudomorph after Parisite, Novo Horizonte, Bahia, Brazil – 3.4 cm

Synchysite, Novo Horizonte, Bahia, BrazilRhabdophane pseudomorph after Parisite, Novo Horizonte, Bahia, Brazil – 2.6 cm

Synchysite, Novo Horizonte, Bahia, BrazilRhabdophane pseudomorph after Parisite, Novo Horizonte, Bahia, Brazil – 2.0 cm


Synchysite, Novo Horizonte, Bahia, Brazil Rhabdophane pseudomorph after Parisite – 2.4 cm

Also from Novo Horizonte, a tabular crystal of rutilated quartz, in superb condition and with bright prismatic golden rutile crystals:

Rutilated Quartz, Novo Horizonte, Bahia, Brazil

Rutilated Quartz, Novo Horizonte, Bahia, Brazil – 7.6 cm

From Brumado, excellent pleochroic crystals of uvite tourmaline, exhibiting purple hues at certain angles and greenish hues when viewed from other angles. The first two photographs below are views of the same uvite crystal from different viewing angles.

Uvite Tourmaline (Pleochroic), Magnesite,  Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, BrazilUvite Tourmaline (Pleochroic), Magnesite, Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, Brazil
Crystal 0.8 cm

Uvite Tourmaline (Pleochroic), Magnesite,  Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, BrazilUvite Tourmaline (Pleochroic), Magnesite, Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, Brazil
Same crystal as prior photo

Uvite Tourmaline (Pleochroic), Magnesite,  Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, BrazilUvite Tourmaline (Pleochroic), Magnesite, Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, Brazil
5.4 cm

Uvite Tourmaline (Pleochroic), Magnesite,  Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, Brazil Uvite Tourmaline (Pleochroic), Magnesite, Pombas Mine, Brumado (Bom Jesus dos Meiras), Bahia, Brazil
Crystal 1.2 cm

Another unusual tourmaline for Brumado, green dravite crystals are quite uncommon.

Dravite Tourmaline, Brumado (Bom Jesus dos Meiras), Bahia, Brazil

Dravite Tourmaline, Magnesite, Brumado (Bom Jesus dos Meiras), Bahia, Brazil – 1.5 cm crystal

The update also includes specimens from other well-known finds and localities

Elbaite Tourmaline, Barra do Salinas, Coronel Murta, Minas Gerais, Brazil Elbaite Tourmaline, Barra do Salinas, Coronel Murta, Minas Gerais, Brazil – 2.9 cm

Brazilianite, Telirio Claim, Linoplois, Divino das Laranjeiras, Brazil

Brazilianite, Telirio Claim, Linoplois, Divino das Laranjeiras, Brazil
Crystals to 3 cm

Fluorapatite, Bertrandite, Faria Mine, Golconda District, Governador Valadares, Minas Gerais, Brazil

Fluorapatite, Bertrandite, Faria Mine, Golconda District, Governador Valadares, Minas Gerais, Brazil
Crystal 1.5 cm

Hematite (Iron Rose). Coluna Mine, Miguel Burnier District, Ouro Preto, Minas Gerais, Brazil

Hematite (Iron Rose). Coluna Mine, Miguel Burnier District, Ouro Preto, Minas Gerais, Brazil
Field of view approximately 4 cm

Hydroxylherderite, Morro Redondo Mine, Coronel Murta, Minas Gerais, Brazil

Hydroxylherderite, Morro Redondo Mine, Coronel Murta, Minas Gerais, Brazil – 5.3 cm

Posted by: Raymond McDougall on 01.23.2014 | Filed under: Recent Mineral Updates | Comments (0)

This Brazil update contains some brilliant specimens. Two matrix fluorapatites, in purple and blue, are really special! Two exquisite hematite iron roses – one is a great old-timer. The elbaite tourmalines and other fine minerals are excellent with lots of character, so I hope you’ll enjoy looking through them.