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Posted by: Raymond McDougall on 02.25.2017 | Filed under: Latest, Recent Mineral Updates | Comments (0)

 

I’ve posted the first of the new Tucson specimens in this Wodginite Update (click here). These are sharp, lustrous wodginite crystals from a small recent find in the Linopolis district, near Divino das Larajeiras, Minas Gerais, Brazil. Wodginite is not a common mineral, and it is quite difficult to acquire good crystals. The identification of these ones has been confirmed at the University of Arizona, and, along with subsequent EDS work, it has been established that of the various members of the wodginite group, they are wodginite.

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

 Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil – 2.5 cm

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

Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil – 2.7 cm

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

Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil – 3.2 cm

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

Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil – 2.6 cm

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

Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil – 3.2 cm

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

Wodginite, Linopolis District, Divino das Laranjeiras, Minas Gerais, Brazil – 2.0 cm

Posted by: Raymond McDougall on 09.27.2016 | Filed under: Latest, Recent Mineral Updates | Comments (0)

 

I’ve posted some excellent new specimens in this Brazil Update (click here). This update is a mix of great pieces from various finds and localities. Among them, there is a superb spessartine from the 2003 pocket at the Navegadora Mine and a gorgeous rutile star with glass-clear pale smoky quartz crystals over it. This update features some exceptionally fine crystals of rutile var struverite-ilmenorutile, and it also includes sharp crystals of chrysoberyl var. alexandrite. Many more fine specimens, including excellent crystals of montebrasite, brazilianite, spodumene var. kunzite, muscovite (including “star”-twinned crystals), rutilated quartz and sceptered quartz.

Spessartine Garnet, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil

 Spessartine Garnet, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil – 6 cm

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

Quartz on a Rutile-Hematite star, Novo Horizonte, Bahia, Brazil
Field of view 6 cm

 Rutile, var. Struverite-Ilmenorutile, Golconda District, Governador Valadares, Minas Gerais, BrazilRutile, var. Struverite-Ilmenorutile, Golconda District, Governador Valadares, Minas Gerais, Brazil – 4.1 cm

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

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 – 2.5 cm

Rutile, Diamantina, Jequitinhonha Valley, Minas Gerais, Brazil

Rutile, Diamantina, Jequitinhonha Valley, Minas Gerais, Brazil – 3.8 cm

Montebrasite, Telirio Claim, Linoplois, Divino das Laranjeiras, Minas Gerais, Brazil

Montebrasite, Telirio Claim, Linoplois, Divino das Laranjeiras, Minas Gerais, Brazil
Field of view 3.3 cm

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

Brazilianite, Telirio Claim, Linoplois, Divino das Laranjeiras, Brazil – 4.2 cm

Chrysoberyl var. Alexandrite, Carnaíba District, Pindobaçu, Bahia, Brazil

Chrysoberyl var. Alexandrite, Carnaíba District, Pindobaçu, Bahia, Brazil – 1.5 cm twin

Chrysoberyl var. Alexandrite, Carnaíba District, Pindobaçu, Bahia, Brazil

Chrysoberyl var. Alexandrite, Carnaíba District, Pindobaçu, Bahia, Brazil – 4.7 cm

Chrysoberyl (Twinned) on Muscovite, Rio das Pratinhas, Arataca, Bahia, Brazil

Chrysoberyl (Twinned) on Muscovite, Rio das Pratinhas, Arataca, Bahia, Brazil – 3.1 cm

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

Spodumene var. Kunzite, Urucum Mine, Galilea, Minas Gerais, Brazil – 6.9 cm

Muscovite ("Star Mica"), Jenipapo Mine, Itinga, Minas Gerais, Brazil

Muscovite (“Star Mica”), Jenipapo Mine, Itinga, Minas Gerais, Brazil – 6.6 cm

Rutilated Quartz, Novo Horizonte, Bahia, Brazil

Rutilated Quartz, Novo Horizonte, Bahia, Brazil – 9.4 cm

Quartz, Barra do Salinas, Coronel Murta, Minas Gerais, Brazil

Quartz, Barra do Salinas, Coronel Murta, Minas Gerais, Brazil – 7.0 cm

Quartz, Barra do Salinas, Coronel Murta, Minas Gerais, Brazil

Quartz, Barra do Salinas, Coronel Murta, Minas Gerais, Brazil – 7.1 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 10.14.2014 | Filed under: Latest, Recent Mineral Updates | Comments (0)

This Brazil Update (click here) features a few selected excellent pieces from Brazil, from the unusual to the amazing.

Brazilianite, Telirio

Brazilianite on Albite, Telirio Mine, Linopolis , Divino das Laranjeiras, Minas Gerais, Brazil – 7.5 cm

The update includes two remarkable brazilianite specimens from the closed Telirio Mine, a classic Medina aquamarine, a fantastic rutilated quartz from Novo Horizonte, tourmalines, Sapo fluorapatites, a super Brumado dolomite, blue quartz, and a Novo Horizonte hematite that is a black mirror.

aquamarine medina

Beryl var. Aquamarine, Medina, Jequitinhonha Valley, Minas Gerais, Brazil – 5.5 cm

Rutilated quartz

Rutilated Quartz, Novo Horizonte, Bahia, Brazil – 8.2 cm