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Freibergite

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UVM611066

Freibergite

Classic Locality

Description Tabs

Description
Locality: 
Black Pine Mine, Black Pine Ridge, Granite County, Montana, United States of America
Class: 
Massive/Crystalline
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 2.9 × 2.7 cm
Description

Massive grey freibergite in quartz matrix.   In one tiny vug, I think I can see the edge of a tiny crystal.   Collected by Lazlo Dudas in the 1960s.    An unusual change of pace from this locality best known for it's colorful arsenates.   

Mineral Data
What's on the rock

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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