Wired News – US Silica Purchases EP Minerals- industrial minerals million , · The acquisition also included an approximately one million ton-per-year dry plant located near Seagraves, Texas. ... The Company has become Nevada's largest exporter of industrial minerals …CALIFORNIA’S NON-FUEL MINERAL PRODUCTION 2001industrial minerals Construction sand and gravel was California's leading industrial mineral with a total value of $953 million produced for the year, a one percent increase from 2000 (final USGS data).