Quality of dolomite

The chemical structure of the rock: CaO - 27,89-28,72%; MgO - 18,84- - 8,06-8,37%. Fe2O3-content ranges 0,55-1,63%.
Volume weight: 2,06-2,28 g/cm3, average-2,21 g/cm3
Water absorption: 5,-9,3%, average-6,9%
Pressure: average when dry: 902 kg/cm2 average when water absorbed 701 kg/cm2
Frost-resistance: 25 cycles
Softening index: 0,69-0,93
Frost-resistance index: >0,75
Heat-resistance: 600-800° C