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Goethite

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CHP912382

Goethite

Classic Locality

Description Tabs

Description
Locality: 
Serra da Mina Mine, Cercal, Santiago do Cacém, Setúbal District, Portugal
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 1 × 0.7 cm
Description

specimen with some beautiful black well formed crystals of goethite on matrix.

c. 4335

Mineral Data
What's on the rock

Goethite

Formula: 
α-Fe3+O(OH)
Strunz: 
4.00.
Crystal System: 
Orthorhombic
Hardness: 
5.0 - 5.5
Type Locality: 
Hollertszug Mine (Hollerter Zug Mine), Dermbach, Herdorf, Siegerland, Rhineland-Palatinate, Germany

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