Pimpsten; smergel; naturlig korund, naturlig granat og andre naturlige slibe­midler, også varmebehandlede, knust eller pulveriseret
Natural calcium phosphates, unworked Natural barium sulphate (barytes) ; natural barium carbonate (witherite), whether or not calcined, other than barium oxide Infusorial earths, siliceous fossil meals and similar siliceous earths (for example, kieselguhr, tripolite or diatomite), whether or not calcined, of an apparent specific gravity of 1 or less Emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated, crude or in pieces Pumice stone; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated, ground or powdered