Xanthoconite (rare - Type Locality) on Barite

Alte Hoffnung Gottes Mine, Freiberg, Erzgebirge, Saxony, Germany
Miniature, 4.2 x 2.5 x 1.8 cm
Start Time: 12/21/2014 6:30:00 pm (CST)
End Time: 12/30/2014 6:36:17 pm (CST)
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Item Description

Xanthoconite is a rare sulfosalt, being silver arsenic sulfide. It is a dimorph or different crystal form of proustite. This old, showy piece features sparkly red clusters of xanthoconite microcrystals very richly and aesthetically scattered amidst parallel-growth blades of a wedge of two-toned barite from the famous old German Type Locality in the Erzgebirge - the Alte Hoffnung Gottes Mine in the Freiberg District. Valued at $900-1000. VERY RARE!

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