In a filing to BSE, country's largest manganese producer said it has increased the prices of all ferro grades of ore by 50 per cent over previous quarter (January-March) prices.
The company said the prices of all grades of fines are increased by 10 per cent.
The company revises prices of manganese ore on a quarterly basis.
"The price of all grades of SMGR (Mn 30 per cent) is increased by 20 per cent and SMGR Low (Mn 25 per cent) is increased by 15 per cent over the previous quarter prices," the filing said.