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Dolomite With Marcasite

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CLB118391

Dolomite With Marcasite

my own find 2012

Description Tabs

Description
Locality: 
Stromberg Quarry, Stromberg, Hunsrück, Rhineland-Palatinate, Germany
Size Range: 
Small cabinet (7-10 cm)
Size: 
8.2 × 7 × 5.5 cm
Description

Modt probably the dark microcrystals powdered on the dolomite are marcasite, but also pyrite and arsenopyrite or pyrolusite is possible.

Mineral Data
What's on the rock

Dolomite

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

Marcasite

Formula: 
FeS2
Strunz: 
2.EB.10a
Crystal System: 
Orthorhombic
Hardness: 
6.0 - 6.5

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