State-owned MOIL has increased the prices of various grades of manganese ore from Thursday, the company said in a release. Prices of all ferro grades of the ore have been raised by 30 per cent, while those of chemical grades have been hiked by 10 per cent, the company said. Prices of SM grade and fines have been increased by 25 per cent, it said. Electrolyte manganese dioxide’s prices have been kept unchanged. Shares of MOIL were up 1 per cent at ₹383.90 on the BSE.