. Native Copper Slab | The Gem Shop, Inc.

Native Copper Slab


Native Copper Slab

Native Michigan copper slabs feature copper-rich ore with quartz, basalt, epidote, and calcite coated with a thin coat of epoxy to prevent oxidation. 

Michigan's Keweenaw Peninsula is considered the most important locality in the world for pure native copper Mining began in 1845 and continued through 1982, and over 7 million tons of refined copper were recovered from the mines. At the turn of the 20th century it led the world in copper production and "Lake Copper" was the purity standard.

Each slab is approximately 5cm x 4.5cm.