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Goethite Psm Gypsum

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AST146139

Goethite Psm Gypsum

Description Tabs

Description
Locality: 
Kamariza Mines, Agios Konstantinos, Lavrion District, Attiki Prefecture, Greece
Size Range: 
Small cabinet (7-10 cm)
Size: 
7 × 4 × 3.5 cm
Description

Among the most famous pseudomorphs from Lavrion are the goethite psm gypsum specimens that now are very hard to find.On this specimen are a few gypsum pseudomorphs after very lustrus botryoidal goethite on iron rich matrix.

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

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.

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