The high purity silica sand is processed from the quality silica(or quartz ) stone, have a high purity of SiO2,a low inpurity content, which as raw materials of optical glass, refractory, metallurgy, ceramic, foundry, abrasives etc. Chemical Analysis And Particle Size Distribution/Specification First Grade Second Grade Chemical Analysis Data SiO2(%) 99.0%-99.95% 99.85%-99.90% Al(ppm) 20max 30max Fe(ppm) 2-5 5-20 Ca(ppm) 0.5-1 1-2 Mg(ppm) 0.5-1 1-2 Na(ppm) 1-3 3-10 Ti(ppm) 0.5 0.5-1 K(ppm) 1-3 3-10 Li(ppm) 0.1 0.2 Particle Size 3000um-75um,detailed size distribution according to client's requirement