Product Description
Physically, they are very Hard, Compact, Fine grained, equi-granular homogeneous rocks of sedimentary nature (Sandstone) & metamorphic nature (Quartzite).
| Color: | Minor color tonal variations exist but within the tolerance limit. |
| Hardness: | 6.5 to 7 on Moh’s Scale |
| Density: | 2.3 to 2.4 Kg/cm3 |
| Compressive Strength: | 90 to 140 N/mm2 |
| Modulus of Rupture: | 16-40 N/mm2 |
| Water Absorption: | 1.0 – 1.2 % |
| Porosity: | Low to very low |
| Weather Impact: | Resistant |
Chemically, they are very resistant Mono-Mineralic rocks, principally composed of silica. The other minor constituents vary from origin to origin
| SiO2: | 95-97% |
| Iron (Fe2O3): | 0.5%-1.5% |
| Alumina (Al2O3): | 1 to 1.5% |
| Soda (Na2O) & Potash (Kro): | Less then 1% |
| Lime (CaO): | Less then 0.5% |
| Magnesia (MgO): | Less then 0.5% |
| Loss On Ignition (LOI): | Less then 0.5% |
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