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Delafossite

Type Locality
Mednorudyanskoye Cu Deposit, Nizhnii Tagil, Sverdlovskaya Oblast', Middle Urals, Urals Region, Russia
Mineral Data
CuFeO2
Strunz: 
4.AB.15
Physical Properties
Crystal System: 
Trigonal
Streak: 
Black
Hardness: 
5.5
Tenacity: 
brittle