The metal does not occur free in Nature. Its principal ores are the molybdenite, the molybdenum disulfide, that can be found in the USA (Colorado), in Canada (Britannic Colombia) and in Chile. Other minerals with possible industrial interest are the powellite (Ca(MoW)O4) and the wulfenite (PbMoO4). Molybdenum can also be obtained as secondary product during the tungsten extraction.