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Pyrargyrite Polybasite & Stephanite

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JYJ502194

Pyrargyrite Polybasite & Stephanite

Description Tabs

Description
Locality: 
St Andreasberg District, Lower Saxony, Germany
Class: 
Mixed Specimens
Size Range: 
Small miniature (3-4.5 cm)
Size: 
2.3 × 3 × 1.8 cm
Description

A fine sample hosting flat polybasite and sparkling black stephanite from an ancient mining district. 

Mineral Data
What's on the rock

Pyrargyrite

Formula: 
Ag3SbS3
Strunz: 
2.GA.05
Crystal System: 
Trigonal - Ditrigonal Pyramidal
Hardness: 
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

Stephanite

Formula: 
Ag5SbS4
Strunz: 
2.GB.10
Crystal System: 
Orthorhombic - Pyramidal
Hardness: 
2.0 - 2.5
Type Locality: 
Freiberg District, Erzgebirge, Saxony, Germany