Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lime and cement 25 29 Feldspar; leucite; nepheline and nepheline syenite; fluorspar Commodity Code Description 25 29 10 - Felspar 25 29 21 - - Containing by weight 97% or less of calcium fluoride 25 29 22 - - Containing by weight more than 97% of calcium fluoride 25 29 30 - Leucite; nepheline and nepheline syenite