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Chalcocite With Tennantite

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RSL637077

Chalcocite With Tennantite

Description Tabs

Description
Locality: 
Mantos De Cobre Mine, Paipote, Copiapó Province, Atacama Region, Chile
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 3.8 × 3.5 cm
Largest Crystal: 
0.40cm
Description

Group of sharp chalcocite crystals, some isolated and other interpenetrated, tabular and with very clear twinned pseudohexagonal forms. Intense metallic luster, gray color. They stand out on a matrix of bright calcite and minor tennantite. The specimens of this locality are very rare. Novelty in Sainte-Marie-aux-Mines 2017. The Mantos Cobrizos mine is a type of "mantle" deposit. This is a small Cu deposit, located in the mining district of Los Cóndores, close to Paipote, Copiapó. So far the production has been made a small scale.

Mineral Data
What's on the rock

Chalcocite

Formula: 
Cu2S
Strunz: 
2.BA.05
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.0

Tennantite

Formula: 
Cu6[Cu4(Fe,Zn)2]As4S13
Strunz: 
2.GB.05
Crystal System: 
Isometric
Hardness: 
3.0 - 4.5
Type Locality: 
Cornwall, England, UK