In nature, copper is found in the Earth's crust, 70 ppm, in metal form and in minerals such as chalcopyrite, chalcosite, bornite, tetrahedrite, enargite and antlerite . Primary hydrothermal copper is mainly related to basic igneous rocks and as a product of supergene cementation. Otherwise copper is found in various minerals and metals . In nature, copper is also found in sea water, 0.001-0.002 ppm . The isotopes found in nature are 63Cu (69.09 %, stable) and 65Cu (30.91 %, stable) .
In pure solid form, copper exist in a face-centered cubic structure .
Keweenaw Peninsular, Lake Superior, USA (largest deposit of primaru copper); Tsumeb, Namibia and Chessy, France, Ural mountains, Russia 
Silver, calcite, malachite, chalcosite, bornite and other secondary copper minerals .