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Glaskopf

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ESM784071

Glaskopf

Description Tabs

Description
Locality: 
Hermannstein, Wetzlar, Lahn-Dill, Giessen Region, Hesse, Germany
Class: 
Crystal Group/Cluster
Size Range: 
Cabinet (10-18 cm)
Size: 
13 × 11 × 5 cm
Description

Black botryoidal glaskopf (Malapertus Mine)

Mineral Data
What's on the rock

Glaskopf

Variety Of: 

Goethite

Formula: 
α-Fe3+O(OH)
Strunz: 
4.00.
Hardness: 
5.0 - 5.5