Specifications super white quartz sand,high purity: 98%-99.9%,Widely use in glass ,cast , Man-made stone plate ... longer melting time, lead to more crystallization, bigger crystals, higher purity and less impurities.(2) Good hardness, longer life.(3) Chemical ... water washed good cleanness.(4) Special treated products get higher purity, better toughness, and better grinding effect.5. Agents wantedOur ...