Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lirne and cement 25 11 Natural barium sulphate (barytes); natural barium carbonate (witherite), whether or not calcined, other than barium oxide of heading†2816 Commodity Code Description 25 11 10 Natural barium sulphate (barytes) 25 11 20 Natural barium carbonate (witherite)