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Chalcoalumite & Ajoite

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MMM29949

Chalcoalumite & Ajoite

Description Tabs

Description
Locality: 
New East Wheal Russell, Tavistock, Devon, United Kingdom
Size Range: 
Thumbnail (1-3cm)
Size: 
1.3 × 2.3 × 0.8 cm
Description

Slate matrix with minor cuprite & native copper with micro crystalline ajoite, chalcoalumite and brochantite.

Collected on Adit Level in the 1990’s

Wonderful under a lens.

Mineral Data
What's on the rock

Chalcoalumite

Formula: 
CuAl4(SO4)(OH)12·3H2O
Strunz: 
7.DD.75
Crystal System: 
Monoclinic
Hardness: 
2.5
Streak: 
White
Type Locality: 
Copper Queen Mine (Halero Mine), Queen Hill, Bisbee, Warren District, Mule Mts, Cochise Co., Arizona, USA

Ajoite

Formula: 
(K,Na)Cu7AlSi9O24(OH)6·3H2O
Strunz: 
9.EA.70
Crystal System: 
Triclinic
Hardness: 
0.0
Type Locality: 
New Cornelia Mine, Ajo, Arizona, United States of America