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Proustite & Polybasite

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CR117060

Proustite & Polybasite

Description Tabs

Description
Locality: 
Imiter Mine, Tinghir Province, Drâa-Tafilalet Region, Morocco
Size Range: 
Small cabinet (7-10 cm)
Size: 
9 × 6.5 × 5 cm
Description

This is an extremely rich proustite specimen from the famous Imiter mine.

Lustrous sharp and deep red proustite crystal clusters sitting on crystallized acanthite and thin tabular polybasite crystals.

Beautiful specimen of a very good quality.

Polybasite was PXRD confirmed (picture #6)

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