• Copper / Silver - CUAG28

Copper / Silver - CUAG28

Native Copper-Silver Specimen, Keweenaw Peninsula 

8.5" wide

This very rare native metal combination was found in the Keweenaw Peninsula of Michigan; associated with native copper deposits. This specimen has been etched (in acid) and sprayed (with lacquer) to prevent oxidation. Locality: Calumet, Michigan.