Bazalt                          Size 100х100х100 mm, 100х100х50 mm, 50x50x5
    Physical & mechanical properties
volumetric weight................................................2810 - 2980 kg/m3
water-absorbtion.................................................0,06 - 1,8%
compression strength.........................................150 - 250 MPa
flexure strength.............................................. .... 160 - 270 MPa
attritive ability of rock........................................0,44 - 0,5 g/cm2

      Minerals
pyroxene..................................................................35 - 38%
plagioclase.............................................................30 - 45%
gupersten.................................................................15 - 39%
qthers........................................................................3%