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Azurite Malachite & Gypsum

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DVE118980

Azurite Malachite & Gypsum

Ex-David J. Eicher Collection; ex-John H. Eicher Collection
Classic Locality

Description Tabs

Description
Locality: 
Kennecott, Nizina District, Valdez-Cordova, Alaska, United States of America
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 2.8 × 2.1 cm
Description

A hollow nodule “geode” of azurite and malachite is filled with transparent gypsum, from an old, classic American locality. Collected by John H. Eicher in the 1930s.

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...

Malachite

Formula: 
Cu2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
3.5 - 4.0

Gypsum

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

Seller Information

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