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Krausite & Alunogen & Copiapite

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CSL94185

Krausite & Alunogen & Copiapite

Rare Mineral

Description Tabs

Description
Locality: 
Javier Mine, Huac-huas, Lucanas Province, Ayacucho Department, Peru
Size Range: 
Thumbnail (1-3cm)
Size: 
2.8 × 1.7 × 2.3 cm
Largest Crystal: 
0.80cm
Description

This is a nice combination sulphate species. The main attraction on the specimen is the Krausite. It's an unusual potassium-iron sulphate, forms tabular crystals on white alunogen and purplish coquimbite matrix. The colour of the krausite crystals on natural light is yellow-grey, in artificial light pinkish. Other associating minerals are yellow copiapite in platy crystals and blue chalcanthite.

Mineral Data
What's on the rock

Krausite

Formula: 
KFe(SO4)2·H2O
Strunz: 
7.CC.05
Crystal System: 
Monoclinic
Hardness: 
2.5
Streak: 
White
Type Locality: 
Sulphur Hole (Sulfur Hole; Sulphur pit), Mule Canyon, Yermo, Calico District (Daggett District), Calico Mts (Calico Hills), San Bernardino Co., California, USA

Alunogen

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

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
Loranth Minerals

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