| Element | Chemical Formula | Concentration (%) |
| Si | SiO2 | 57.41 |
| Fe | Fe2O3 | 21.79 |
| Ti | TiO2 | 6.41 |
| Al | Al2O3 | 4.31 |
| K | K2O | 4.05 |
| Ca | CaO | 1.96 |
| P | P2O5 | 1.14 |
| Mg | MgO | 1.03 |
| V | V2O5 | 0.72 |
| Cl | Cl | 0.46 |
| Mn | MnO | 0.37 |
| S | SO3 | 0.25 |
| Zr | ZrO2 | 0.11 |
| Cu | CuO | - |
| Zn | ZnO | - |