Buying a copper mine is investing in a copper mine. According to relevant public information, investors buy long-term copper futures contracts on the futures exchange of Chicago Mercantile Exchange, or buy shares of copper miners such as FreeportMcMoRan or SouthCopperCorporation. This kind of investment in copper mines is called buying copper mines. Copper ore refers to the aggregate of available copper-bearing natural minerals. Copper ore is generally an aggregate of copper sulfide or copper oxide and other minerals, which reacts with sulfuric acid to produce blue-green copper sulfate. The industrial minerals of copper are: native copper, chalcopyrite, chalcocite, tetrahedrite, azurite, malachite and so on.