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Xanthoconite & Proustite

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CR598569

Xanthoconite & Proustite

Rare Mineral

Description Tabs

Description
Locality: 
Alte Hoffnung Gottes Mine, Kleinvoigtsberg, Freiberg District, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
13 × 7.5 × 3 cm
Description

Beautiful microcrystals of honeybrown xanthoconite with dark proustite crystals on baryte matrix.

Very good old specimen from Armin Wendland collection - acquired 1990.

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

Proustite

Formula: 
Ag3AsS3
Strunz: 
2.GA.05
Crystal System: 
Trigonal
Hardness: 
2.0 - 2.5