| Major Oxides | Bulk (%) | Wet sieved (%) | Scrubbed for 8 minutes (%) | * Grade-A, Glass sand Ref. [16] |
| SiO2 | 98.51 | 99.41 | 99.62 | 99.70 |
| Al2O3 | 0.73 | 0.16 | 0.04 | 0.20 |
| Fe2O3 | 0.04 | 0.03 | 0.01 | 0.01 - 0.013 |
| TiO2 | 0.09 | 0.04 | 0.02 | 0.02 (**) |
| CaO + MgO | 0.08 | 0.02 | 0.01 | 0.02 (**) |
| Na2O + K2O | 0.11 | 0.09 | 0.02 | 0.02 (**) |