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Gold Changoite & Kröhnkite

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PDM621612

Gold Changoite & Kröhnkite

Description Tabs

Description
Locality: 
La Compañia Mine, Sierra Gorda, Antofagasta Province, Antofagasta Region, Chile
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.9 × 1.5 × 1.1 cm
Description

Gold flakes on matrix with blue boleite patches. At the rear side of the matrix there are also good crystals of yellow changoite and blueish green kröhnkite.

Ex Gerard Vogel specimen.

Mineral Data
What's on the rock

Gold

Formula: 
Au
Strunz: 
1.AA.05
Crystal System: 
Isometric
Hardness: 
2.5 - 3.0

Changoite

Formula: 
Na2Zn(SO4)2·4H2O
Strunz: 
7.CC.50
Crystal System: 
Monoclinic
Hardness: 
2.0 - 3.0
Colour: 
Colorless
Streak: 
White
Type Locality: 
Sierra Gorda District, Antofagasta Province, Antofagasta Region, Chile

Kröhnkite

Formula: 
Na2Cu(SO4)2·2H2O
Strunz: 
7.CC.30
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0
Streak: 
White
Type Locality: 
Chuquicamata Mine, Chuquicamata District, Calama, El Loa Province, Antofagasta Region, Chile

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