The detail specification as follows:
1.Quartz sands (silica sands)
high purity grade:sio2:99.95%min-99.8%min fe2o3:3ppm max-30ppm max, size:2-200 mesh
deliberated grade:sio2:99.8%min-99.0%min fe2o3:50ppm max-0.03% max, size:2-325 mesh
2.Natural crystal powder
sio2:99.90%min-99.99%min , size:2-325 mesh
3.Fused quartz ingot
sio2:99.9%min fe2o3:50ppm max,al2o3:0.03% max, size:5-100 mesh
4.Quartz in lump
special grade:sio2:99.9%min,
1st grade:sio2:99.8%min fe2o3:0.004%max
2nd grade:sio2:99.7%min,fe2o3:0.008%min
3rd grade:sio2:99.5%min fe2o3:0.03%min.
5.Micro-silica powder
sio2:99.5%min-99.0% min, fe2o3:0.02%max,al2o3:0.3% max, size:200-800 mesh
6.Fused quartz powder
sio2:99.9%max, fe2o3:50ppm max, size:2-325 mesh