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Silver


Mineral: Silver
Chemistry: Ag
Size: 50mm; (close up FOV 35 mm)
Owner: Malcolm Southwood
Photographer: Malcolm Southwood

A large (50 mm by 30 mm) sectile "leaf" of silver on a sliver of friable, powdery grey-black and reddish matrix (see Photograph 3) which appears to consist of iron oxides and, possibly, massive cuprite (?).  

The silver has a slightly yellowish tinge, and is largely untarnished, due to the presence of mercury. Gebhard (1999) reports that this variety of silver at Tsumeb, from deep in the third oxidation zone, contains up to 25% mercury so that it is, in fact, silver amalgam.  

The specimen was formerly in the collection of Karlheinz Grosch (Germany).