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Malachite & Azurite

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JNM588329

Malachite & Azurite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Cabinet (10-18 cm)
Size: 
11.5 × 5.5 × 3.5 cm
Description

Advanced pseudomorph stage of malachite replacing azurite. The cross-section shows a thickness of roughly 1-2 mm for the malachite layer (see video). Additional botryoidal malachite aggregates are scattered over the display side of the specimen. The simple term "matrix" does not at all embrace the character of the interesting piece of base rock of this specimen, holding several blue and green copper ore veins as well as cavities filled with quartz, calcite and azurite crystals.

Please watch the 360° video for your convenience (contact me for a full resolution version).

Mineral Data
What's on the rock

Malachite

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

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...
Video

Malachite, Azurite, Quartz

JN Minerals

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