Sir,
We are in need of silica sand for our overseas client. 
They are using two types of silica sand.

1)    Color : Milky White
2)      Size : 0.5 – 1.0 mm
3)      PH : 7

Chemical Analysis Wt %

4)      Sio2 :   99.15
5)      Al2O3 : 0.28
6)      TiO2 :   0.02
7)      Fe2O3 :0.02
8)      CaO :   0.02
9)      Na2O : 0.03
10)     K2O :   0.02
11)     MnO :  0.01
12)     MgO :  0.03
13)     L.O.I   0.18

This is one quality they are using. 
The second type is as follows.
Size: 0.5 – 1.0 mm.
Chemical analysis 

Silica (SiO2):                           99.68%
Alumina (Al2O3):                     0.060%
Ferric Oxide (Fe2O3):              0.050%
Calcium Oxide (CaO):              0.040%
Magnesium Oxide (MgO):         Nil
Sodium Oxide (Na2O):             0.080%
Potassium Oxide (K2O):           0.020%
Loss on Ignition (LOI):             0.050%
Ph (10% Suspension):               7.68

Expecting a quick reply 
Regards,