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Siderite & Dolomite

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TBM1083798

Siderite & Dolomite

Classic Locality

Description Tabs

Description
Locality: 
Villaret Pit, Susville, Grenoble, Isère, Auvergne-Rhône-Alpes, France
Class: 
Crystal Group/Cluster
Size Range: 
Miniature (4.5-7 cm)
Size: 
4 × 5.5 × 4 cm
Largest Crystal: 
4.00cm
Weight: 
87.00gr
Description

Very nice  lenticular crystals of light brown Siderite up to 40 mm with Dolomite crystals up to 13 mm

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