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Eskolaite & Chalcopyrite

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ESM220545

Eskolaite & Chalcopyrite

Description Tabs

Description
Locality: 
Outokumpu, North Karelia, Finland
Size Range: 
Miniature (4.5-7 cm)
Size: 
2.7 × 4.8 × 4.2 cm
Description

Lustrous black eskolaite crystals in chalcopyrite matrix type locality

Mineral Data
What's on the rock

Eskolaite

Formula: 
Cr2O3
Strunz: 
4.CB.05
Crystal System: 
Trigonal
Hardness: 
8.0 - 8.5
Colour: 
Black
Streak: 
Green
Type Locality: 
Outokumpu Cu-Co-Zn-Ni-Ag-Au ore field, Eastern Finland Region, Finland

Chalcopyrite

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