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

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

The Chimney Rock Quarry in Bound Brook, NJ has produced world-class specimens of native copper. Unusually large specimen of crudely crystallized n...

From Chimney Rock Quarry, Bound Brook, Somerset County, New Jersey one of a kind, rare metallic native copper coated with blue green chrysocolla. A...

Sculptural formation of sharp, distinct copper crystals from Jiujiang Co., Jiangxi Province, China. The copper looks beautiful under magnification...