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Proustite Xanthoconite & Polybasite

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CR30665

Description Tabs

Description
Locality: 
Imiter Mine, Tinghir Province, Drâa-Tafilalet Region, Morocco
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.3 × 3 × 2.3 cm
Largest Crystal: 
0.20cm
Description

Beautful specimen covered with bloodred proustite crystals (on all sides) and a dozend sharp, orangebrown xanthoconite crystals.

With minor polybasite crystals.

Mineral Data
What's on the rock

Proustite

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

Xanthoconite

Formula: 
Ag3AsS3
Strunz: 
2.GA.10
Crystal System: 
Monoclinic
Hardness: 
2.0 - 3.0
Type Locality: 
Himmelsfürst Mine, Brand-Erbisdorf, Freiberg District, Erzgebirge, Saxony, Germany

Polybasite

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