Industrial sand is a term normally applied to high purity silica sand products with closely controlled sizing. It is a more precise product than common concrete and asphalt gravels. Silica is the name given to a group of minerals composed solely of silicon and oxygen, the two most abundant elements in the earth’s crust. In spite of its simple chemical formula, SiO2, silica exists in many different shapes and crystalline structures. Found most commonly in the crystalline state, it also occurs in an amorphous form resulting from Weathering or plankton fossilization. Chemical Analysis Over size 0.600mm 0.5 % Under size 0.100mm 0.5 % Silica Sand( G. A ) Silica Sand ( grade B )