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 25 08 60 - Mullite Commodity Code Description 25 08 60 00 - Mullite