California has diamonds. The magmas that carry them to the surface can be much younger. Mining for diamonds in one pipe at Kimberley went to a depth of 3,500 below the surface. Gold particles have formed from volcanic gases at Mount Erebus . Our term for copper is based on the Latin name for the island of Cyprus-cuprum.
Mining is no longer economically important on the island.
The mineral probably formed in metasomatised mantle peridotite.