The main ores are the oxides, such as pyrolusite , MnO 2 ; hausmannite , Mn 3 O 4 ; and manganite , MnO(OH).

Manganese ores may accumulate in metamorphic rocks or as sedimentary deposits, frequently forming nodules on the sea floor. The world's main producers are Georgia , Ukraine , South Africa , Brazil , Gabon , and India .

48/50% Mn max 0.1%P, $/mtu metallurgical Mn