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Proustite & Polybasite

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CR817988

Proustite & Polybasite

Description Tabs

Description
Locality: 
Imiter Mine, Tinghir Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystals on Matrix
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.2 × 5.5 × 5.3 cm
Weight: 
250.00gr
Description

This is truely an exceptional proustite specimen!

Lustrous and gemmy, ruby-red proustite crystals cover all sides of the chalcoprite matrix on this showy and excellent specimen from a old find at the Imiter Mine of Morocco.
This is very fine and very rich representation of the species and locality of this sought-after silver sulfosalt.

With black tabular polybasite crystals.

Rare in such rich specimens from this locale.

More pictures to see at "labels".

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
Labels
Label Images - only: Proustite & Polybasite
Label Images - only: Proustite & Polybasite
Label Images - only: Proustite & Polybasite
Label Images - only: Proustite & Polybasite
Label Images - only: Proustite & Polybasite