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Goethite Psm Pyrite On Albite

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PDM694709

Goethite Psm Pyrite On Albite

Pseudomorph

Description Tabs

Description
Locality: 
Vals Valley, Surselva Region, Grisons, Switzerland
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 6 × 2.3 cm
Description

Cubic pyrite crystals that have been replaced by iron oxides, probably goethite. They grew on a matrix of white albite and transparent quartz, associated to hexagonal flattened clinochlore groups.

Acquired in 1983. Ex. Gerard Vogel collection.

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

Pyrite

Formula: 
FeS2
Strunz: 
2.EB.05a
Crystal System: 
Isometric
Hardness: 
6.0 - 6.5

Albite

Formula: 
NaAlSi3O8
Strunz: 
9.FA.35
Crystal System: 
Triclinic
Hardness: 
6.0 - 6.5
Streak: 
White
Type Locality: 
Finnbo (Finbo), Falun, Dalarna, Sweden

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