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Proustite Acanthite & Gypsum

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PCZ175523

Proustite Acanthite & Gypsum

Description Tabs

Description
Locality: 
Měděnec, Klášterec nad Ohří, Krušné Hory, Ústí nad Labem Region, Czech Republic
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.5 × 2 cm
Description

Micro-crystals of red proustite with acanthite and fantastically curved crystals of gypsum. A great specimen from uncommon locality.

Mineral Data
What's on the rock

Proustite

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

Acanthite

Formula: 
Ag2S
Strunz: 
2.BA.35
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.0 - 2.5
Streak: 
lead grey
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.
Peter Crozier Minerals