Chemical composition (XRF)
| Element | Content [%] |
| Na2O | 0,13 |
| MgO | 0,59 |
| Al2O3 | 4,68 |
| SiO2 | 62,8 |
| P2O5 | 0,04 |
| K2O | 1,09 |
| CaO | 16,9 |
| TiO2 | 0,27 |
| Fe2O3 | 1,40 |
Phase composition (XRD)
Diffraction pattern:
Popis difraktogramu:
In přibylov opoka were found quartz SiO2, calcite CaCO3 and microcline K2O•Al2O3•6SiO2.