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Pyrargyrite Polybasite & Freibergite

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PDM577484

Pyrargyrite Polybasite & Freibergite

Description Tabs

Description
Locality: 
San Genaro Mine, Castrovirreyna, Castrovirreyna Province, Huancavelica Department, Peru
Class: 
Crystal Group/Cluster
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 0.9 cm
Description

A highly lustrous, deep red pyrargyrite crystal with a rough undamaged termination, on a small matrix of tabular metallic black polybasite crystals to 4 mm. The combo is spotted by tiny black rounded crystals of freibergite of about 0.5 mm. It is mounted on a plexi support. Ex. Bart Van de Laar specimen #3229.

Previous labels supplied (not photographed)
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

Freibergite

Formula: 
Ag6[Cu4Fe2]Sb4S13-x
Strunz: 
2.GB.05
Hardness: 
3.5 - 4.0
Colour: 
Grey
Type Locality: 
Reiche Zeche Mine, Himmelfahrt Mine, Freiberg, Freiberg District, Erzgebirge, Saxony, Germany

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