Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lime and cement 25 29 Feldspar; 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