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Mark Wrigley (2)'s Photo Gallery

3DA-NQDCerussite (Var: Chrome-Cerussite) PbCO3

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Dundas mineral field, Zeehan district, West Coast municipality, Tasmania, Australia

A chunk of limonite matrix is well covered with discrete crystal groups of pale lime green to yellow crystals of chrome cerussite. Individual crystal terminations are to 5mm. A few of the upper surfaces have minor damage or attached matrix/contact from the opposite wall of the pocket.Genuinely an excellent specimen of this much discussed varietal of cerussite.
Copyright: © 2005 Thames Valley      Photo ID: 39392     Uploaded by: Mark Wrigley (2)   View Count: 731   Approval status: Public galleries    Type: Photo - 350 x 332 pixels (0.1 Mpix)

K1E-X2PForsterite (Var: Peridot) Mg2SiO4

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Sapat Gali, Naran, Kaghan Valley, Mansehra District, Khyber Pakhtunkhwa, Pakistan

A beautifully terminated bright and gemmy crystal of green gem peridot with a tiny amount of retained matrix
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10152     Uploaded by: Mark Wrigley (2)   View Count: 1247   Approval status: Public galleries    Type: Photo - 345 x 350 pixels (0.1 Mpix)

UND-8RGTourmaline A(D3)G6(Si6O18)(BO3)3X3Z

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Otjua Mine, Otjua Farm 37, Karibib, Erongo Region, Namibia

A very neat little group of two double terminated polychromatic tourmalines with a little attached quartz and pinkish lepidolite. Very good specimen for Karibib, one little chip on the flat termination of the fatter crystal.Taller crystal is 2.9cm X 0.9cm, fatter crystal is 1.8cm X 1.2cm.
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10151     Uploaded by: Mark Wrigley (2)   View Count: 815   Approval status: Public galleries    Type: Photo - 254 x 350 pixels (0.1 Mpix)

NL7-9WDStibnite Sb2S3

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No. 5 Mine, Baia Sprie, Maramureș, Romania

A lovely example of vein formed stibnite crystals intergrown and slightly overcast with tansparent "snowflake" like crystals of barite. The crystals are bluish grey steel coloured with characteristic (for the locality) pointed termination. Some of the individual crystals reach 8cm in length through the "tangle." This piece has been obtained from an old collection in Hungary and dates from 1972.
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10148     Uploaded by: Mark Wrigley (2)   View Count: 634   Approval status: Public galleries    Type: Photo - 280 x 350 pixels (0.1 Mpix)

HJ2-C19Augite (CaxMgyFez)(Mgy1Fez1)Si2O6

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Walla Crag, Derwentwater, Keswick, Allerdale, Cumbria, England, UK

A matrix of andesite is in contact with some crystalline quartz and augite. There is one large reasonably well terminated and faced augite approximately 2.5cm across and better smaller 7mm crystal at the back of a surface vug.Interesting locality piece with antique collection label.
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10145     Uploaded by: Mark Wrigley (2)   View Count: 1012   Approval status: Public galleries    Type: Photo - 350 x 246 pixels (0.1 Mpix)

T60-NQ2Beryl (Var: Emerald) Be3Al2(Si6O18)

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Muzo Mine, Muzo Municipality, Boyacá Department, Colombia

A specimen of massive crystalline calcite with a rich inclusion of irridescent pyrite. Sitting on the display face are three euhedral emerald crystals.The main crystal is 13.5mm tall X 7mm wide X 9mm deep (into the matrix.) The termination is is flat and undamaged but does have contact marks and natural flaws. Internally the crystal is gemmy blue green and also contains veils, flaws and a some inclusions.The second crystal is 11mm X 6mm with a rough termination. The colour is a pale green and the emerald is bright, gemmy with some internal veils.The third crystal is 9mm X 8mm deep. This one is not terminated and although gemmy in places is fairly opaque.Overall a nice specimen
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10144     Uploaded by: Mark Wrigley (2)   View Count: 1863   Approval status: Public galleries    Type: Photo - 350 x 307 pixels (0.1 Mpix)

2TY-1FEMalachite Cu2(CO3)(OH)2

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Shangulowé Mine, Kambove District, Lualaba, DR Congo

A very sharp and well defined group of barite crystals which ahve been completely pseudomorphed by malachite. There is a little surface "blue" with the presence of chrysocolla.
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10143     Uploaded by: Mark Wrigley (2)   View Count: 1091   Approval status: Public galleries    Type: Photo - 341 x 350 pixels (0.1 Mpix)

CFW-D56Calcite (Var: Cobaltoan Calcite) (Ca,Co)CO3 , Heterogenite Co3+O(OH) , Brochantite Cu4(SO4)(OH)6 , Malachite Cu2(CO3)(OH)2

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Mashamba West Mine, Kolwezi mining district, Lualaba, DR Congo

A specimen of gemmy translucent pink cobaltoan calcite formed over heterogenite with some acicular malachite and individual brochantite crystal groups. There are some inclusions of malachite and heterogenite in the calcite.
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10142     Uploaded by: Mark Wrigley (2)   View Count: 604   Approval status: Public galleries    Type: Photo - 350 x 289 pixels (0.1 Mpix)

M3U-PUYDolomite (Var: Cobaltoan Dolomite) (Ca,Mg,Co)CO3 , Malachite Cu2(CO3)(OH)2 , Chrysocolla Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O

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Kolwezi Mine, Kolwezi, Kolwezi mining district, Lualaba, DR Congo

An exceptional specimen of dolomite with a brilliant mauve pink cobaltoan skin and associated malachite and chrysocolla.
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10141     Uploaded by: Mark Wrigley (2)   View Count: 932   Approval status: Public galleries    Type: Photo - 350 x 290 pixels (0.1 Mpix)

WQT-2JQPlancheite Cu8(Si8O22)(OH)4·H2O

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Shangulowé Mine, Kambove District, Lualaba, DR Congo

A matrix free cavity of acicular plancheite with additional attached fibres and very minor dioptase. A fantastic specimen under a loupe!
Copyright: © 2003 Thames Valley Minerals      Photo ID: 10140     Uploaded by: Mark Wrigley (2)   View Count: 677   Approval status: Public galleries    Type: Photo - 276 x 350 pixels (0.1 Mpix)
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