| 25131000 | Siliceous fossil meals (for example, kieselguhr, tripolite and diatomite) and similar siliceous earths, whether or not calcined, of an apparent specific gravity of 1 or less: Pumice stone |
| 25131100 | Umic stone; emery; natural corundum,natural garnet and other natural abrasives, whether or not heat- |
| 25131900 | Umic stone; emery; natural corundum,natural garnet and other natural abrasives, whether or not heat- |
| 25132010 | Emery, natural corundum, natural garnet and other natural abrasives: Emery |
| 25132020 | Emery, natural corundum, natural garnet and other natural abrasives: Natural Corundum |
| 25132030 | Emery, natural corundum, natural garnet and other natural abrasives: Natural garnet |
| 25132090 | Emery, natural corundum, natural garnet and other natural abrasives: Other |