High purity silica sand is processed from the quality silica stone, for its high content of SiO2 and low impurity and used for optical glass. Silica Sand for optical glass , for its high content of SiO2, and low impurity. Refined Silica Sand is processed from natural silica stone, for its high content of SiO2 and low impurity. Application: 1. Silica sand is the main raw material of plate glass, float glass, optical glass. 1 widely used for producing optical glass. 2 refractory material 3 metallurgy, ceramic, foundry and abrasives etc. Package: 1. 1000kgs packed in a big bag 2. 25kgs/bag with 40 bags in a big bag 3. 25kgs/bag with 40 bags on a pallet Other package could be supplied as request.