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Polybasite

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TPX606129

Polybasite

Rare Mineral

Description Tabs

Description
Locality: 
Bouismas Mine, Zagora Province, Drâa-Tafilalet Region, Morocco
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.4 × 3.5 × 1.5 cm
Weight: 
25.00gr
Description

Excellent group of polybasite crystals on calcite matrix partially acidulated. The seller labeled these pieces as Argentite, but I am convinced that it belongs to the series Polybasite-Pearceite due to the hexagonal crystallization in tabular form and the red reflection in the fractures of the crystals. This is just my appreciation, the pieces have not been analyzed.

Mineral Data
What's on the rock

Polybasite

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

Seller Information

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