... with a factory and quartz mine, specializing in exporting Quartz sand,Quartz Tube, Quartz powder with high quality and competitive price in China. Quartz sand / silica powder ... , water treatment filtration, exact foundry, refractory, ceramic, casting, printing, dyeing, quartz melting, petroleum, chemical, abrasive, etc. Specification:1. SiO2: 80-99 ...