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Sphalerite With Chalcopyrite On Dolomite

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SKI579470

Sphalerite With Chalcopyrite On Dolomite

Description Tabs

Description
Locality: 
Büschhof Quarry, Wirtenbach, Waldbröl, Cologne, North Rhine - Westphalia, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.1 × 2 × 1 cm
Largest Crystal: 
0.70cm
Description

Sphalerites from schretzmair quarry are well known for their epitaxial growth of chalcopyrite. This specimen is special as the sphalerite is almost completely coated by microcrystalline chalcopyrite. Sadly the crystal shows a small damage on the backside. Nevertheless a very attractive and rare specimen for the locality.

Mineral Data
What's on the rock

Sphalerite

Formula: 
ZnS
Strunz: 
2.CB.05a
Crystal System: 
Isometric
Hardness: 
3.5 - 4.0

Chalcopyrite

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

Dolomite

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

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