Gold ores /ɡoʊld ɔrz/ – natural mineral formations containing gold in quantities at which it is economically feasible to extract it using modern production methods. In addition to gold ores themselves, gold-bearing ores of copper, nickel, lead and zinc, silver, iron (ferruginous quartzites) are known, manganese, in which gold is an associated component. More than 30 gold minerals have been discovered. The main industrial significance is native gold.