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 15 Articles of stone or of other mineral substances (including carbon fibres, articles of carbon fibres and articles of peat), not elsewhere specified or included. 68 15 91 Articles containing magnesite, dolomite or chromite Commodity Code Description 68 15 91 00 Articles containing magnesite, dolomite or chromite