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Tetrahedrite Chalcopyrite Calcite & Dolomite

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RHT783312

Tetrahedrite Chalcopyrite Calcite & Dolomite

Classic Locality

Description Tabs

Description
Locality: 
St Andreasberg, Goslar, Lower Saxony, Germany
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 4.8 × 3 cm
Weight: 
123.00gr
Description

Very old specimen with a nice antique label. Most prominent is a twinned glossy tetrahedrite crystal, but there are a few more that are partly encrusted with tiny chalcopyrite crystals, this 'hull' broken at the tips. Some more chalcopyrite (marcasite?) spread between grayish brown dolomite, a bit of creamy white/beige calcite crystals at one side.

A very unique German classic from before 1910.

Mineral Data
What's on the rock

Tetrahedrite

Formula: 
Cu6[Cu4(Fe,Zn)2]Sb4S13
Strunz: 
2.GB.05
Hardness: 
3.5 - 4.0

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

Dolomite

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