| Oxide | Content [%] |
| SiO2 | 55.33 |
| Al2O3 | 14.12 |
| CaO | 24.02 |
| Fe2O3 | 0.71 |
| Na2O | 0.40 |
| K2O | 0.42 |
| TiO2 | 1.80 |
| MgO | 1.2 |
| ZnO | 2.0 |
| (Summary) | 100 |