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Azurite Malachite & Bayldonite

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NST605917

Azurite Malachite & Bayldonite

Description Tabs

Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.4 × 3.5 × 4 cm
Largest Crystal: 
2.00cm
Weight: 
76.00gr
Description

A very attractive pseudomorph of malachite after azurite from tsumebs first oxidation zone. Twinned cerussite, lustrous azurite and olive green microcrystals of mottramite are also present on bayldonite matrix.

This is an excellent display 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...

Malachite

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

Bayldonite

Formula: 
PbCu3(AsO4)2(OH)2
Strunz: 
8.BH.45
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Penberthy Croft Mine, St Hilary, Mount's Bay District, Cornwall, England, UK...