Section 05 Mineral products 25 Salt, sulphur; earths and stone; plastering materials, lirne 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