Native Copper RingThis ring features a piece of native copper set in sterling silver. Native copper is a naturally occurring metallic element found in pure, metallic form in certain geologic environments. Details: Material: Native copper set in sterling silver Appearance: Metallic reddish brown stone with natural texture Formation: Occurs in hydrothermal veins, basalt flows, and sedimentary deposits as pure copper Physical Properties: Mohs hardness 2. 53; metallic