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CC48634

ALLARGENTUM ps. after DYSCRASITE

ALLARGENTUM ps. after DYSCRASITE


Size:
65 x 88 x 55 mm
Weight:
251 g
Regular price £450.00 GBP
Regular price Sale price £450.00 GBP
Sale Sold out
Taxes included. Shipping calculated at checkout.

Item held in the UK store

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Detailed information

Species Allargentum, ps. after Dyscrasite, Calcite
Dimensions 65 x 88 x 55 mm
Weight 251 g
Locality Bouismas, Bou Azer Tazenakht, Ouarzazate Province Souss-Massa-Draâ Region, Morocco
Condition No recorded repairs
Allargentum, a natural alloy of dominant silver and minor antimony, is a very rare mineral and usually only occurs as featureless flat sheets of metal. In 2009/2010 a small silver mine at Bouismas in the Bou Azer Mining District in Morocco produced some exceptional crystallized Allargentum specimens, or at least Allargentum pseudomorphs after the crystal form of Dyscrasite. The crystals were etched out from surrounding white Calcite matrix to produce dramatic freestanding dendritic branches. This superb small cabinet specimen from Bouismas is richly endowed on all sides with silvery grey, metallic, Allargentum, displaying a lovely rose-silver patina under magnification. Under magnification it is also apparent that some of the pseudomorphs are coated with fine filaments of Native Silver. On the back of the specimen a 5 cm long 'branch' of Allargentum pseudomorphous after Dyscrasite looks really stunning, and fresh, providing a dilemma as to which way round to display it. Ex Nick Hawes collection.

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