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…
Locality guide
Bisbee
Bisbee, USA: a historic copper-ore district famed for blue-green malachite, azurite roses, cuprite, native copper, and sculptural copper-carbonate forms.
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