How much metal does the ore contain?
Copper ore does not contain pure copper, but either a coppersulphuriron compound (chalcopyrite) or a coppersulphur compound (chalcocite). The metal must first be separated from such minerals by means of multistep metallurgic processes. In many cases these processes are so complied that they account for up to 30 per cent of the metal price. The metal recovered .