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Freibergite Dolomite & Pyrite

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CSL143662

Description Tabs

Description
Locality: 
Eagle Mine, Gilman, Eagle County, Colorado, United States of America
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.8 × 3.4 × 2.4 cm
Description

Good crystals of uncommon freibergite from Colorado. It forms typical steel grey tetrahedrons with golden pyrite and white dolomite crystals. Unfortunately some visible contact occurs on the piece, although it's still a great piece. Comes with the old label of Wilson Minerals (Idaho Springs, CO)

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

Dolomite

Formula: 
CaMg(CO3)2
Strunz: 
5.AB.10
Crystal System: 
Trigonal - Rhombohedral
Hardness: 
3.5 - 4.0
Streak: 
White

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5
Loranth Minerals

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