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Proustite & Polybasite

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RHT719686

Proustite & Polybasite

Description Tabs

Description
Locality: 
Imiter Mine, Tinghir Province, Drâa-Tafilalet Region, Morocco
Class: 
Combination
Size Range: 
Thumbnail (1-3cm)
Size: 
1.8 × 1.8 × 0.7 cm
Description

Cherry-red proustite and metallic gray, platy polybasite (visual ID) crystals on matrix. One polybasite crystal is rather big (about 3 mm). Looks great under the microscope.

Matrix cut.

Mineral Data
What's on the rock

Proustite

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

Polybasite

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