| Size fraction (µm) | High-Yield Product | Low-Yield Product | ||
| Grade SiO2 (%) | Recovery (%) | Grade SiO2 (%) | Recovery (%) | |
| All sizes | 99.18 | 88.19 | 98.99 | 68.47 |
| +125 | 99.60 | 84.42 | 99.50 | 64.84 |
| 500 - 125 | 99.66 | 62.47 | 99.58 | 48.15 |