we can provide you those silica related products as bellows:
>Natural silica sand:
1.dry silica sand milled by ball mill
Fe2O3 30-120ppm
SiO2  min 99.7%
Al2O3 max 2000ppm
size: 20-140mesh
supply capacity: up to 1500mt per month
2. wet silica sand by wet milling
Fe2O3 30-120ppm
SiO2  min 99.7%
Al2O3 max 2000ppm
size: 30-140mesh
moisture: max 5%
supply capacity: up to 20,000MT per month.
> acid treated silica sand processed by Barmac
Fe2O3 10-50ppm
SiO2  min 99.8%
Al2O3 max 300ppm
size: 30-140mesh
capacity of supply: up to 1500MT per month
> Fused silica 
lumps, chips, sand, powder
Fe2O3  max 30ppm
SiO2  min99.90%
Capacity of supply: up tp 1500 mt per month
The quoatation is only a reference price.
More details and precise information pls contact me via hllinda@163.com, thanks for your attention!