Section 05 MINERAL PRODUCTS 25 Salt; sulphur; earth and stone; plastering materials lime and cement. 25 11 NATURAL BARIUM SULPHATE (BARYTES); NATURAL BARIUM CARBONATE (WITHERITE) Commodity Code Description 25 11 10 Natural barium sulphate (barytes) 25 11 20 Natural barium carbonate (witherite)