Sub-Chapter2005200620072008
Salt (including table salt)$36,528$141,260$125,966$35,633
Unroasted iron pyrites.  $198 
Natural sands of all kinds$78,762$90,890$230,941$267,376
Quartz (other than natural sands); quartzite $1,473  
Other clays (not including expanded clays of heading 68.06), andalusite, ky ...$19,077$136,520$219,700$241,197
Chalk.$78,782$31,850$110$82,338
Natural calcium phosphates   $6,131
Siliceous fossil meals$86,540$77,641$63,431$60,857
Pumice stone; emery; other natural abrasives$1,029  $76
Slate   $798
Marble, travertine, ecaussine and other stone$221,432$84,693 $4,739
Granite, porphyry, basalt, sandstone and other stone  $2,029$5,175
Pebbles, gravel, broken or crushed stone$4,728$4,700  
Dolomite, whether or not calcined or sintered $574 $64,822
Natural magnesium carbonate (magnesite)$5,030   
Gypsum; anhydrite; plasters$129,859$190,239$319,918$829,796
Quicklime, slaked lime and hydraulic lime$5,114,653$2,817,759$7,234,843$7,775,052
Portland cement, aluminous cement, slag cement$46,954,431$28,331,915$23,449,407$68,428,851
Asbestos. $951$7,052 
Natural steatite, whether or not roughly trimmed$62,725$3,392$7,485$7,439
Natural borates and concentrates thereof  $5,625 
Mineral substances$3,083$19,542$66,544$35,339
Total$52,796,659$31,933,399$31,733,249$77,845,619