The ministry of mines is not looking to revise rates of royalty for minerals until the auctioned mines come into production stage, the Minister Coal, Mines and Parliamentary Affairs Pralhad Joshi said. “As most of the auctioned mines are yet to come into production stage, the impact of the present royalty rates on the downstream industry cannot be determined at this stage. Therefore, at present it is not feasible to revise the rates of royalty for minerals,” the minister said in a written reply to Rajya Sabha on Monday.