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Calcite With Chalcocite & Malachite

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CLB125380

Calcite With Chalcocite & Malachite

from my own collection/ex coll. Wittig
Classic Locality

Description Tabs

Description
Locality: 
Hosenberg Copper Mine, Fischbach, Birkenfeld, Rhineland-Palatinate, Germany
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 5.3 × 3.5 cm
Description

Very rarely seen specimen from the Hosenberg copper mine. The calcite crystals are almost completely encrusted by secondary copper minerals. The blueish-black is most probably chalcocite (maybe bornite?) with several green micro-crystals of malachite. Afew minor dings and/or contact marks.

Mineral Data
What's on the rock

Calcite

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

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

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