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Proustite & Polybasite

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CR882979

Proustite & Polybasite

Rare Mineral

Description Tabs

Description
Locality: 
Imiter Mine, Tinghir Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.6 × 2.8 cm
Description

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

Lustrous sharp and deep red proustite crystal clusters and thin tabular black polybasite crystals sitting on ore-matrix.

Beautiful specimen of a very good quality.

Polybasite was PXRD confirmed (picture #7)

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