Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lime and cement 25 13 Pumice stone; emery; natural corundum, natural garnet and other natural abrasives, whether or not heat-treated Commodity Code Description 25 13 10 - Pumice stone 25 13 20 - Emery, natural corundum, natural garnet and other natural abrasives