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Goethite

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MGR579712

Goethite

Description Tabs

Description
Locality: 
Rio Tinto Mines, Huelva, Andalusia, Spain
Class: 
Crystal Group/Cluster
Size Range: 
Small cabinet (7-10 cm)
Size: 
7.3 × 5 × 2.9 cm
Description

The specimen is very colorful and show botryoidal crystals in green, violet, purple, blue and yellow color tones. During the last years there was lot of goethite from Spain, but from Tharsis - this particular sample is from Rio Tinto, a completely different locality and much more rare. Undamaged, except lower backside was on the rock.

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