Our Co.,is specialized in manufacturing high purity (fused) silica/quartz product.The details of our products are as fllws:1) silica mineral (silica lump,silica grain,silica powder) Sio2 99.9-99.98% Al2O3 400ppm max. Fe2o3 50ppm max2) Fused Silica (fused silica lump,fused grain,fused silica powder) Sio2 99.9-99.98% Al2o3 100-400ppm Fe2O3 10-50ppm Uranium content:0.1-0.8ppb3)Natural Crystal (crystal lump,crystal grain,crystal powder)