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Xanthoconite

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GFM617149

Xanthoconite

Rare Mineral

Description Tabs

Description
Locality: 
St Michaelis Mine, Annaberg-Buchholz, Erzgebirge, Saxony, Germany
Class: 
Crystal Group/Cluster
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 3.8 × 2.8 cm
Description

the rare Ag-As-Sulfide occurs here as thin micro crystalline aggregates of 5 mm, beside of some grey metallic pyargyrite, red proustite, and yellow argentopyrite on dark violet fluorite matrix. Old time specimens collect around 1920

Mineral Data
What's on the rock

Xanthoconite

Formula: 
Ag3AsS3
Strunz: 
2.GA.10
Crystal System: 
Monoclinic
Hardness: 
2.0 - 3.0
Type Locality: 
Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany