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Acanthite Psm Polybasite

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SCH167124

Acanthite Psm Polybasite

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Description
Locality: 
La Sirena Mine, Guanajuato, Guanajuato Municipality, Guanajuato, Mexico
Size Range: 
Thumbnail (1-3cm)
Size: 
1.2 × 0.7 × 1.3 cm
Description

Attractive cluster of acanthite pseudomorph after polybasite with smaller acanthite crystals scattered on the specimen.

 

Mineral Data
What's on the rock

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

Polybasite

Formula: 
[(Ag,Cu)6(Sb,As)2S7][Ag9CuS4]
Strunz: 
2.GB.15
Crystal System: 
Monoclinic - Prismatic
Hardness: 
2.5 - 3.0
Streak: 
black
schani

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