13 PR ODUC TION and PREP ARA TION Mined P r oducts fr om Y our Stat e 20 18 Alabama C oal c ement st one lime sand and gr a v el c ommon cla y s Alask a C oal g old lead silv er zinc sand and gr a v el Ariz ona C oal c opper molybdenum sand and gr a v el c ement st one silv er Ark ansas Br omine c ement sand and gr a v el st one lime Calif ornia Bor on c ement g old sand and gr a v el st one C olor ado C oal g old molybdenum sand and gr a v el c ement st one C onnecticut C ommon cla y s st one sand and gr a v el Dela w ar e St one sand and gr a v el magnesium g emst ones F lorida Phosphat e r ock st one c ement sand and gr a v el zir c onium Geor gia C ement C la y s k aolin st one sand and gr a v el Ha w aii St one sand and gr a v el Idaho L ead lime phosphat e r ock sand and gr a v el st one Illinois C oal sand and gr a v el st one c ement tripoli Indiana C oal c ement lime sand and gr a v el st one I ow a C ement lime sand and gr a v el st one gypsum Kansas C oal helium c ement salt st one sand and gr a v el K entuck y C oal c ement sand and gr a v el st one c ommon c l ays L ouisiana C oal c ommon cla y s salt sand and gr a v el st one Maine Sand and gr a v el c ement st one Maryland C oal c ement peat sand and gr a v el st one Mas sachusetts C ommon cla y s lime st one sand and gr a v el Michig an Ir on or e c ement nick el c onc entr at es salt st one sand and gr a v el Minnesota Ir on or e sand and gr a v el st one lime Mis sis sippi C oal cla y s fuller s ear th ball bent onit e sand and gr a v el st one Mis souri C oal c ement st one lead lime sand and gr a v el US GS st at e miner al ofc es mining c ompan y w ebsit es