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Millerite Dolomite & Chalcopyrite

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SER1107410

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Description
Locality: 
Zollverein Mine, Essen, North Rhine - Westphalia, Germany
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 4.4 × 1.4 cm
Description

several tufts of grey metallic millerite acicular crystals on dolomite with several golden chalcopyrite clusters 

Mineral Data
What's on the rock

Millerite

Formula: 
NiS
Strunz: 
2.CC.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 3.5
Type Locality: 
Jáchymov (St Joachimsthal), Jáchymov District (St Joachimsthal), Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic

Dolomite

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

Chalcopyrite

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

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Start 30 Dec 18:00
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