We are manufacturing & Exporting PURIFIED SODIUM FELDSPAR & PURIFIED POTASSIUM FELDSPAR POWDER. -------------------------------------------------------------------------------------------------------------------- ** PURIFIED POTASSIUM FELDSPAR POWDER. K2O = ( 10%) Al2O3 = ( 17% ) SiO2 = ( 71% ) Na2O= ( 1.5% ) Fe2O3= ( 0.05%) ** PURIFIED SODIUM FELDSPAR POWDER. Na2O = ( 9 %) -