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Eskolaite

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