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Erythrite & Heterogenite

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MEX531598

Erythrite & Heterogenite

Classic Locality

Description Tabs

Description
Locality: 
Bieber, Biebergemünd, Main-Kinzig, Darmstadt, Hesse, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.4 × 2.1 × 1 cm
Description

Red balls of erythrite crystals together with botroidal  black heterogenite. The last one isn't analysed.

Mineral Data
What's on the rock

Erythrite

Formula: 
Co3(AsO4)2·8H2O
Strunz: 
8.CE.40
Hardness: 
1.5 - 2.5
Type Locality: 
Daniel Mine (St. Daniel Mine), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Heterogenite

Formula: 
CoO(OH)
Strunz: 
4.FE.20
Crystal System: 
Trigonal
Hardness: 
3.0 - 5.0
Type Locality: 
Wolfgang Maaßen Mine field, Schneeberg District, Erzgebirge, Saxony, Germany