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Siderite

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MCP728727

Siderite

Description Tabs

Description
Locality: 
Allevard, Isère, Auvergne-Rhône-Alpes, France
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.8 × 5.3 × 3.4 cm
Largest Crystal: 
2.00cm
Description

Brown, partly lustrous, rhombohedral siderite crystals up to 20 mm on edge on matrix from Allevard, Isère, France, associated with quartz crystals up to 12 mm tall. The siderite crystals show only very minor imperfections and have very interesting growth patterns on the crystal faces.

Mineral Data
What's on the rock

Siderite

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

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