Section 13 Articles of stone, plaster,cement,asbestos, mica or similar materials; ceramic products; glass and glassware 68 Articles of stone, plaster, cement, asbestos, mica or similar materials 68 05 Natural or artificial abrasive powder or grain, on a base of textile material, of paper, of paperboard or of other materials, whether or not cut to shape or sewn or otherwise made up Commodity Code Description 68 05 10 - On a base of woven textile fabric only 68 05 20 - On a base of paper or paperboard only 68 05 30 - On a base of other materials