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Siderite Dolomite & Cobaltoan Calcite

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CLB219204

Siderite Dolomite & Cobaltoan Calcite

ex collection Julian Gruber
Classic Locality

Description Tabs

Description
Locality: 
Clara Mine, Wolfach, Black Forest, Baden-Württemberg, Germany
Size Range: 
Cabinet (10-18 cm)
Size: 
10.5 × 4.7 × 4.2 cm
Description

Lustrous pale brown balls of siderite crystals with white dolomite and small, pale pink, partly double-terminated cobaltoan calcite crystals.

Mineral Data
What's on the rock

Siderite

Formula: 
FeCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Streak: 
White

Dolomite

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

Cobaltoan Calcite

Variety Of: 

Calcite

Formula: 
CaCO3
Strunz: 
5.AB.05
Hardness: 
3.0
Formula: 
(Ca,Co)CO3
Hardness: 
0.0

Seller Information

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