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