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Goethite

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MGR735309

Goethite

Description Tabs

Description
Locality: 
Filón Sur, Tharsis, Huelva, Andalusia, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.1 × 5.4 × 2.9 cm
Description

Very attractive sample from this famous discovery. I saw hundreds of specimen from the locality - but less than 1% showed spheres in this dimension - this is an exceptional dimension of spheres! All of them show this amazing iridiscent layer which appears in all colors of the rain-bow. Even better in person, no significant damages to report.

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