Sub-Chapter20062007
Other clays (not including expanded clays of heading 68.06), andalusite, ky ...$841$689
Pumice stone; emery; other natural abrasives $93
Granite, porphyry, basalt, sandstone and other stone$53 
Pebbles, gravel, broken or crushed stone $78
Limestone flux; limestone$4,035 
Total$4,929$860