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Mineral: A mineral contains same substance throughout and it may be either a single chemical or mixtures of chemicals.

Rock: Rock contains two or more minerals.

Ore: Ore is a source of minerals from which we can recover the substance; preferably the metal with an inorganic process profitably.

The difference between mineral, rock and ore are- mineral contains single substance throughout, however, rock contains more than two minerals, and ore contains a commercial source from which a metal can be extracted.