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% |
Natural Mint Sandstone tiles, random crazy, pool coping and wall cladding...
Location : Australia
