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Chrysocolla Psm Azurite

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BMM628026

Chrysocolla Psm Azurite

Description Tabs

Description
Locality: 
Lupoto Mine, Kakumba, Kipushi, Haut-Katanga, DR Congo
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
10.5 × 5.5 × 4.3 cm
Description

A colorful pseudomorph of chrysocolla after azurite. This exciting specimen shows needle-shaped crystals grown on well-formed, big, sharply terminated crystals showing azurite form (up to 3.8 cm long). Partly crystallzed with malachite – including the seemingly fractured surfaces. It features an intense cyan color. This is a truly remarkable sight – much better in person!

Mineral Data
What's on the rock

Chrysocolla

Formula: 
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x < 1)
Strunz: 
9.ED.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.5

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...