Pure Quartz Sand & Powder SiO2Fe2O3Size≥99.9-99.99%≤5-100ppm1-0.5mm,0.5-0.2mm,0.2-0.01mm,0.01-0.075mm, 45um. Main use: It is used in the industries such as refractory quartz glass tube, high-grade glass products, electrical equipments and optic fibre products.