| Compound | Quantity% | Compound | Quantity% |
| SiO2 | 53.8 | Cu2O | 3.2 |
| Fe2O3 | 21.5 | MnO | 0.4 |
| Al2O3 | 10.9 | SO3 | 0.7 |
| MgO | 5.5 | P2O5 | 0.5 |
| CaO | 3.4 | Total | 100 |