physical and mechanical properties
| Volume weight | 2700 | Kg/m³ |
| Water absorption | 0,22 | % |
| Compression strength | 200 | MPa |
| Flexural strength | 17 | MPa |
| Abradability | 0,48 | g/cm² |
| Radio-activity | 1 | class |
mineralogical structure | ||
| Microcline | 50 | % |
| Plagioklaz | 24 | % |
| Quartz | 18 | % |
| Biotit | 7 | % |
| Others | 1 | % |
