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Coquimbite Copiapite & Alunogen

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PJM115258

Coquimbite Copiapite & Alunogen

Description Tabs

Description
Locality: 
Javier Mine, Huac-huas, Lucanas Province, Ayacucho Department, Peru
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 2.7 × 2.5 cm
Description

An atttractive cluster of well formed crystals of coquimbite with deep purple colour, small yellow patches of copiapite and white patches of alunogen. From Peruvian finds of 2009-2010.

Mineral Data
What's on the rock

Coquimbite

Formula: 
Fe2-xAlx(SO4)3·9H2O, x ~0.5
Strunz: 
7.CB.55
Hardness: 
2.5
Streak: 
white
Type Locality: 
Coquimbo Region, Chile

Copiapite

Formula: 
Fe2+Fe3+4(SO4)6(OH)2·20H2O
Strunz: 
7.DB.35
Hardness: 
2.5 - 3.0
Type Locality: 
Copiapó Province, Atacama Region, Chile

Alunogen

Formula: 
Al2(SO4)3·17H2O
Strunz: 
7.CB.45
Crystal System: 
Trigonal
Hardness: 
1.5 - 2.0
Streak: 
White
Earthstones Australia

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