Section 05 Mineral products 25 Salt; sulphur; earths and stone; plastering materials, lime and cement 25 08 Other clays, andalusite, kyanite, etc; mullite; chamotte or dinas earths 25 08 50 Andalusite, kyanite and sillimanite Commodity Code Description 25 08 50 00 Andalusite, kyanite and sillimanite