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Azurite On Limonite Psm Gypsum Psm Calcite

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Azurite On Limonite Psm Gypsum Psm Calcite

Pseudomorph

Description Tabs

Description
Locality: 
Lavrion District Mines, Attiki Prefecture, Greece
Class: 
Combination
Size Range: 
Small cabinet (7-10 cm)
Size: 
8 × 7 × 3 cm
Description

This is an extremely rare piece,with sharp azurite blades of deep intense blue color on matrix of limonite pseudomorph after goethite after gypsum after calcite with calcite and malachite!The piece has several alterations of one species to others!Even double is rare!The piece is one of the few pieces I have seen and one of the best,wtih all alterations being obvious!Azurite blades are also epitaxial to the calcite pseudomorphs,so it could have been a perimorph,as well!An important European specimen!

Mineral Data
What's on the rock

Azurite

Formula: 
Cu3(CO3)2(OH)2
Strunz: 
5.BA.05
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0
Type Locality: 
Chessy copper mines, Chessy-les-Mines, Le Bois d'Oingt, Rhône, Rhône-Alpes, France...

Gypsum

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

Calcite

Polymorph of: 
Formula: 
CaCO3
Strunz: 
5.AB.05
Crystal System: 
Trigonal
Hardness: 
3.0
Streak: 
White

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Start 25 Apr 18:00
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