2529            |    Feldspar; leucite, nepheline and nepheline syenite; fluorspar.
2529.10.00   - Feldspar
2529.21.00     -- Containing by weight 97% or less of calcium fluoride
2529.22.00     -- Containing by weight more than 97% of calcium fluoride
2529.30.00   - Leucite;nepheline and nepheline syenite