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Cronstedtite

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JYJ604114

Cronstedtite

Description Tabs

Description
Locality: 
Wheal Jane, Kea, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.3 × 1.7 × 1.1 cm
Description

Black cronstedtite on matrix. Beautiful old english material.

Mineral Data
What's on the rock

Cronstedtite

Formula: 
Fe2+2Fe3+((Si,Fe3+)2O5)(OH)4
Strunz: 
9.ED.15
Crystal System: 
Monoclinic, Trigonal, Hexagonal
Hardness: 
3.5
Type Locality: 
Příbram, Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic