We are Potassium feldspar powder, Quartz powder and lilithium manufacturer, can offer you the best price quanlity. Details: 1) Place of Origin: China 2) Color: White, 3) Chemical composition: A) Potassic feldspar: K2O: 7% to 12.5%; SiO2: 67% 68%; Al2O3 more than 16.5%; Fe2O3 less 0.15% or 0.1% 0. ...