super white quartz sand,high purity: 98%-99.9%,Widely use in glass ,cast , Man-made stone plate ,plastic ,rubber,and grinding ... ma QUARTZ SAND QUARTZ POWDERQuartz sand ,quartz powder are ... is SiO2 , the color of quartz sand is white ,semitransparent or totally transparent. Widely use in glass ,cast , Man-made stone plate ...