Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lirne and cement 25 29 Felspar; leucite nepheline and nepheline syenite; fluorspar 25 29 21 Containing by weight 97 % or less of calcium fluoride Commodity Code Description 25 29 21 00 Containing by weight 97 % or less of calcium fluoride