Mineral Commodity Summaries 2018 USGS Mineral Resources .
Jan 31, 2018 . For sale by the Superintendent of Documents, U.S. Government Publishing . The Role of Nonfuel Minerals in the U.S. Economy . .. and gravel, iron ore, lime, zinc, phosphate rock, salt, .. Price, average mill value, dollars per ton ... Principal uses for specific clays were estimated to be as follows: ball.Get Price