Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lime and cement 25 08 Other clays (not including expanded clays of heading 6806), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths Commodity Code Description 25 08 10 - Bentonite 25 08 30 - Fire-clay 25 08 40 - Other clays 25 08 50 - Andalusite, kyanite and sillimanite 25 08 60 - Mullite 25 08 70 - Chamotte or dinas earths