2513 Pumice Stone, Emery, Natural Corundum, Natural Garnet and Other Natural Abrasives, Whether or not Heat-treated

2513 (01/1988-..) Pumice Stone, Emery, Natural Corundum, Natural Garnet and Other Natural Abrasives, Whether or not Heat-treated 25131000 (01/2007-..) Pumice Stone 25131100 (01/1988-12/2006) Pumice Stone, Crude or in Irregular Pieces, Incl. Crushed Pumice `bimskies` 25131900 (01/1988-12/2006) Pumice Stone, Crushed or Ground 25132000 (01/1996-..) Emery, Natural Corundum, Natural Garnet and Other Natural Abrasives, Whether or not Heat-treated 25132100 (01/1988-12/1995) Emery, Natural Corundum, Natural Garnet and Other Natural Abrasives, Crude or in Irregular Pieces 25132900 (01/1988-12/1995) Emery, Natural Corundum, Natural Garnet and Other Natural Abrasives, Crushed or Ground