Section 2(1)(m) in The Mineral (Auction) Rules, 2015
(m)"value of estimated resources" means an amount equal to the product of, -(i)the estimated quantity of mineral resources for which the mineral block is being auctioned, expressed in metric tonne; and(ii)[the average price per metric tonne of such mineral as published by Indian Bureau of Mines for the relevant State for a period of twelve months immediately preceding the month of computation of the Value of Estimated Resources: [Substituted by Notification No. G.S.R. 1469(E), dated 30.11.2017 (w.e.f. 20.5.2015).]