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Sculptural formation of sharp, distinct copper crystals from Daye Co., Hubei Province, China.  The copper looks beautiful under magnification. A l...

From Quincy Mine, Hancock, Keweenaw Peninsula Copper District, Houghton County, MichiganLustrous translucent parallel scalenohedral calcite crystal...

Lustrous specimen of native (natural) copper intergrown with greenish basalt matrix. The copper is exposed on all sides and has bright metallic su...