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Azurite Aurichalcite & Rosasite On Smithsonite

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PJM101395

Azurite Aurichalcite & Rosasite On Smithsonite

Description Tabs

Description
Locality: 
Block 14 Opencut, Broken Hill, Yancowinna County, New South Wales, Australia
Size Range: 
Miniature (4.5-7 cm)
Size: 
5.1 × 3.9 × 3.2 cm
Description

A complex and fascinating specimen. The matrix is a mixture of cerussite and anglesite crystals with an open vughy structures. All cavities are lined with smithsonite and branching groups of cuprite after native copper. The cuprite has then been altered on the surface to a combination of acicular groups of light turquoise blue aurichaclite and waxy to pearly light blue to a pale sea blue green rosasite ctystal groups. The cavities are further ienhanced by lusterous gemmy dark blue azurite crystals.

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...

Aurichalcite

Formula: 
(Zn,Cu)5(CO3)2(OH)6
Strunz: 
5.BA.15
Crystal System: 
Monoclinic - Prismatic
Hardness: 
1.0 - 2.0
Type Locality: 
Loktevskoye Mine (Loktevskii Mine), Upper Loktevka River, Rudnyi Altai, Altaiskii Krai, Western-Siberian Region, Russia

Rosasite

Formula: 
(Cu,Zn)2(CO3)(OH)2
Strunz: 
5.BA.10
Crystal System: 
Monoclinic
Hardness: 
4.5
Type Locality: 
Rosas Mine, Narcao, Carbonia-Iglesias Province, Sardinia, Italy

Smithsonite

Formula: 
ZnCO3
Strunz: 
5.AB.05
Hardness: 
4.0 - 4.5
Streak: 
White
Earthstones Australia

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