Listing ID #3706381
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Contact SupplierPhysically, these are recrystallized, Hard, And Compact, fine to very fine grained metamorphosed rocks capable of taking shining polish.
Hardness | 3 to 4 on Mohs Scale |
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Density | 2.55 to 2.7 Kg/cm3 |
Compressive Strength | 70 to 140 N/mm2 |
Modulus of Rupture | 12 to 18 N/mm2 |
Water Absorption | Less than 0.5% (except Rainforest Green/Brown with 2-3%) |
Porosity | Quite low |
Weather Impact | Resistant |
Chemically, they are crystalline rocks composed predominantly of calcite, dolomite or serpentine minerals. The other minor constituents vary from origin to origin.
Lime (CaO) | 28-32% |
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Silica (SiO2) | 3-30% (varies with variety) |
MgO | 20 to 25% |
FeO + Fe2O3 | 1-3% |
Loss On Ignition (LOI) | 20-45% |