State governments need to “harmonise” regulations governing granite and stone quarrying, which would result in a regulatory system that was “transparent and fosters competition,” said Vishwapati Trivedi, Secretary, Ministry of Mines, on Wednesday.

Speaking at the inaugural session of Stona 2012, the international granite and stone fair organised by the All-India Granites and Stone Association, Mr. Trivedi observed that the application of the Granite Conservation and Development Rules, 1999,