Key Players: LafargeHolcim, Cemex, Graymont, Nittetsu Mining, HeidelbergCement, Italcementi Group, Schaefer Kalk, Sumitomo Osaka Cement, NALC, Independent Limestone Company, Todaka Mining, Carmeuse, Lhoist, Eurocement, Mitsubishi Materials, Indiana Limestone Company, Atlantic Minerals Limited, Elliott Stone Company, Fels-Werke GmbH, Mississippi Lime Company, Anhui Conch Cement, South Cement, China Resources Cement, BBMG, Jiangxi Wannianqing, Sanyou-Group, Shougang Lukuang, Dalian Limestone, Sichuan Golden Summit.