Section V — Mineral products
Chapter 25 — Salt; sulfur; earths and stone; plastering materials, lime and cement
Heading
2508 Other clays (not including expande d clays of heading 68.06), andalusite, kyanite and sillimanite, whether or not calcined; mullite; chamotte or dinas earths.
Common commodities
Bentonite clay for ceramicsCommon clay for pottery productionFire-clay bricks for kilnsBall clay used in ceramic bodiesFuller's earth suitable for drilling mudAndalusite minerals for refractory applicationsRefined kyanite crystalsSillimanite stones for high-temperature useMullite powder in ceramic glazesChamotte (grog) for pottery and bricks