Learn about Copper
native copper with spinel-twinned crystals and arborescences; notable from Lake Superior, Itauz, Dongchuan, Corocoro, prized for color and localities.Copper from Keweenaw Peninsula, Michigan, USA
Keweenaw Peninsula copper - classic native copper from Michigan, famed for wiry arborescent sprays, sharp crystal faces, and historic mines prized by collector…
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