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Gratonite & Chalcopyrite

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JYJ708032

Gratonite & Chalcopyrite

Description Tabs

Description
Locality: 
Excelsior Mine, Cerro de Pasco, Pasco Department, Peru
Class: 
Crystals on Matrix
Size Range: 
Small miniature (3-4.5 cm)
Size: 
4.2 × 3.2 × 1.5 cm
Description

SEM-EDS confirmed gratonite grown up on galena associated with greyish arsenopyrite, and filigrane needle chalcopyrite grids (SEM-EDS confirmed). 

 

Mineral Data
What's on the rock

Gratonite

Formula: 
Pb9As4S15
Strunz: 
2.JB.55
Hardness: 
2.5
Streak: 
Black
Type Locality: 
Excelsior Mine, Cerro de Pasco, Pasco province, Pasco department, Peru

Chalcopyrite

Formula: 
CuFeS2
Strunz: 
2.CB.10a
Crystal System: 
Tetragonal
Hardness: 
3.5 - 4.0