specification:<br>
Volumetric Weight: 2730kg/m3<br>
Water-absorbtion: 0.31%<br>
Compression strength 190MPa<br>
Flexure strength 29MPa<br>
Attritive ability of rock 0.35g/cm2<br>
microcline 28&nbsp;&nbsp;&nbsp;&nbsp;plagioclase 34&nbsp;&nbsp;Quartz&nbsp;&nbsp;20&nbsp;&nbsp;Biotite&nbsp;&nbsp;13 other&nbsp;&nbsp;5