native copper with spinel-twinned crystals and arborescences; notable from Lake Superior, Itauz, Dongchuan, Corocoro, prized for color and localities.
Regional guide
Copper from Bisbee, Arizona, USA
Bisbee copper, Arizona — arborescent native copper with cuprite and malachite patina from the Warren district; prized for provenance, crystal form, and oxidize…
Comments