Our factory can supply huge quantities feldspar on different kinds of grades, The K2O in Potassium Feldspar can reach 10%. The Li2O in feldspar powder of Lithium can reach 0.8-1.4%. The Na2O in Sodium Feldspar can reach 10percent. If you are interested in our products, please contact us. Feldspar powder of lithium consists of rich of alkali metals, such as NaK and Li. It is the ideal raw material of glass and ceramic which can take the place of alkali and also can save the energy. producing area:China