... mine, specializing in exporting Quartz sand,Quartz Tube, Quartz powder with high quality and competitive price in China. Quartz ... sand / silica powder is mainly applied to the industries of glass, water ... filtration, exact foundry, refractory, ceramic, casting, printing, dyeing, quartz melting, petroleum, chemical, abrasive, etc. Specification:1. SiO2: 80-99 ...