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Allemontite Gypsum Proustite

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SCH75933

Allemontite Gypsum Proustite

Description Tabs

Description
Locality: 
Harz Mountains, Saxony - Anhalt, Germany
Size Range: 
Thumbnail (1-3cm)
Size: 
2.7 × 2.3 × 2.9 cm
Description

Black allemontite ore with minor proustite and with several transparent tiny gypsum crystals throughout the specimen.

Mineral Data
What's on the rock

Allemontite

Renamed To: 

Stibarsen

Formula: 
AsSb
Strunz: 
1.CA.05
Hardness: 
3.0 - 4.0

Gypsum

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

Proustite

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

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