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Posted by: Raymond McDougall on 01.05.2018 | Filed under: Latest, Recent Mineral Updates | Comments (0)

 

I’ve posted some excellent new specimens from the Conselheiro Pena area in this Brazil Update (click here) – a small number of spessartines from the famous 2003 pocket at the Navegadora Mine, and some fine crystals of wodginite from the recent find at the Itatiaia Mine.

Spessartine

These spessartines are from the famous March 2003 pocket at the Navegadora Mine, regarded as the finest garnet pocket found in Brazil. The Navegadora Mine exploits a pegmatite and produces feldspar for commercial purposes – It is not mined for specimens, and this pocket was unique. In an article in Rocks and Minerals (“Spessartine from the Navegadora Mine, Minas Gerais, Brazil” Vol. 84, Jan-Feb 2009) author John White discusses how these spessrtines formed. While etching was involved, the specific mechanism that resulted in the final forms of these etched crystals remains a mystery.

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

Spessartine, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil – 4.5 cm

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

Spessartine, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil
Close-up of the above specimen, field of view cm

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

Spessartine, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil – 4.8 cm

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

Spessartine, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil – 3.5 cm

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

Spessartine, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil – 3.5 cm

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

Spessartine, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil – 3.5 cm

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

Spessartine, Navegadora Mine, Penha do Norte, Conselheiro Pena, Minas Gerais, Brazil – 2.6 cm

Wodginite

Wodginite is not a common mineral, and it is quite difficult to acquire good crystals. These ones are from a 2017 find that produced a relatively small number of specimens. Their idetification 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.

When initially found, they were sold within Brazil with incorrect locality information. This is often done to protect an original source soon after a find, although it’s not clear whether that was the reason in this case. In any event, they are confirmed to be from the Itatiaia Mine, and the original attibution of early specimens to “Linopolis District, Divino das Laranjeiras” should be corrected.

 

 

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil – 3.5 cm

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil
Termination of the same crystal in the photo above
Approx 3 cm as shown

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil – 3.3 cm

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil – 3.4 cm

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil

Wodginite, Itatiaia Mine, Conselheiro Pena, Minas Gerais, Brazil – 1.6 cm wide

Posted by: Raymond McDougall on 04.15.2015 | Filed under: Latest, Recent Mineral Updates | Comments (0)

 

I’ve added a selection of fine, distinctive specimens in the new China Update (click here). The pieces in this group are very high quality, picked from many different lots. There are beautiful fluorites of various colours and habits, including stunning clear crystals, deep blue, green, purple, and there are great phantoms and zoning in some of them. The update also includes a great pyromorphite, an unusually fine quality Xiefang golden barite (these are virtually always damaged) with a nice phantom, a super cabinet specimen of Shimen calcite with a large twinned crystal, excellent lustrous spessartines and more.

Fluorite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China

Fluorite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China – crystal 1.1 cm

Fluorite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China

Fluorite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China – crystal 1.2 cm

Fluorite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China

Fluorite and Quartz, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China – 5.1 cm

Pyromorphite, Daoping Mine, Gongcheng Co., Guanxi Zhuang A.R., China

Pyromorphite, Daoping Mine, Gongcheng Co., Guanxi Zhuang A.R., China – 6.2 cm

Fluorite (Phantoms), Huangshaping Mine, Guiyang Co., Hunan Province, China

Fluorite (Phantoms), Huangshaping Mine, Guiyang Co., Hunan Province, China – field of view 4.5 cm

Fluorite, Quartz, Yaoganxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China

Fluorite and Quartz, Yaoganxian Mine, Yizhang Co., Chenzhou Prefecture, Hunan Province, China
Field of view 4.0 cm

Fluorite, Quartz, Shangbao Mine, Leiyang Co., Hunan Province, China

Fluorite, Quartz, Shangbao Mine, Leiyang Co., Hunan Province, China
Field of view 2.3 cm

Barite, Xiefang Mine, Ruijin Co., Jianxi Province, China

Barite, Xiefang Mine, Ruijin Co., Jianxi Province, China – 5.1 cm

Calcite, Jiepayu Mine (Shimen Mine), Shimen Co., Hunan Province, China

Calcite, Jiepayu Mine (Shimen Mine), Shimen Co., Hunan Province, China – 11.8 cm

Quartz, Fluorite, Magnetite, Calcite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China

Quartz, Fluorite, Magnetite and Calcite, Huanggang Mines, Hexigten Banner, Ulanhad,
Inner Mongolia A.R., China – 7.1 cm

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

Spessartine Garnet, Tongbei, Yunxiao Co., Fujian Province, China – 5.2 cm

Fluorite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China

Fluorite, Huanggang Mines, Hexigten Banner, Ulanhad, Inner Mongolia A.R., China
Field of view 5.7 cm

Posted by: Raymond McDougall on 11.06.2014 | Filed under: Latest, Recent Mineral Updates | Comments (0)

This Pakistan-Afghanistan Update (click here) features a small number of excellent specimens, from tourmalines and a gorgeous cabinet specimen of spessartine garnet, to some much more unusual specimens, including scapolite and pseudomorphs from Sar-e-Sang.

Spessartine Garnet Crystals

Spessartine Garnet, Albite, Apaligun, Braldu Valley, Baltistan, N.A., Pakistan – 10.2 cm

Elbaite Tourmaline Crystals

Elbaite Tourmaline, Albite, Stak Nala, Gilgit-Skardu Road, Northern Areas, Pakistan – 4.1 cm

Schorl Tourmaline Crystal, Laila Peak, Pakistan

Schorl Tourmaline, Laila Peak, Haramosh Range, Gilgit-Baltistan, Pakistan – 2.9 cm