... silica sand, through high temperature fusion, cooling, smash and selecting. The appearance is colorless and transplanted, a bit of them will ... . And it can be processed to all kinds at the request of customers.Fused Silica Lump CompositionSiO2: 99.92%- ... 200mesh,325mesh.The above size could be used in precisen casting, grinding wheel abrasives, highly quality glass products, refractory material. High ...