Requirements are for PURE 100% Silica sand without any impurities, color particles..or mica..etc...1. Half transparent -Quartz Grit(Silica sand) 40-70 mesh & 70 - 120 mesh 2. 100% Non-Opaque(transparent) Quartz / Milky white / porcelain white : 16-26 mesh & 26-40 mesh? Show More