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 10 25 29 10 00 Commodity Code Description 25 29 10 00 00 - Feldspar 25 29 21 00 00 -- Containing by weight 97 % or less of calcium fluoride 25 29 22 00 00 -- Containing by weight more than 97 % of calcium fluoride 25 29 30 00 00 - Leucite; nepheline and nepheline syenite