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Goethite Psm Gypsum

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KSC682180

Goethite Psm Gypsum

Pseudomorph

Description Tabs

Description
Locality: 
Lavrion District Mines, Attiki Prefecture, Greece
Class: 
Combination
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.7 × 3.7 × 2 cm
Description

Excellent piece of goethite altering gypsum!This is a classic pseudomorphosis from the localitymbut rarely we see such great aeshtetics!The piece shows the cell of crystals of what used to be gypsum!Actually,this is a precise perimorph of gypsum crystals and the gypsum has disappeared!The color contrast and the form set the piece apart from similar ones!The options of display are countless,since the piece is terminated on the back as well!No damage!

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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Start 31 Mar 18:00
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