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Slate Stone Finishing
Slate Stone Finishing

Slate Stone Flooring
Slate Stone Flooring

All Kinds of Natural Stone
Natural Slate Stones



Physically, these are Metamorphic-Argillaceous rocks, which has developed a well-marked splittable cleavages with or without developed recrystallization & spots/knots of minerals like garnet, pyrite, andulasite, etc. They are normally fine to medium grained, moderately hard & compact, less homogeneous with varying textures & shades. It has an ability to split into thin layers along the plane of cleavages due to flattened & elongated minerals along the plane of cleavage.

Hardness: 3.0 to 4.0 on Moh's scale
Density: 2.6 to 2.8 Kg/cm3
Modulus of Rupture: 22 to 34 N/mm2
Compressive Strength: 24 to 36 N/mm2
Specific Gravity: 2.65 to 2.80
Porosity: Low to very low
Water Absorption: 1.5 to 2%
Weather Impact: Resistant
Corrodibility: 0.4 to 0.7%

Chemically, they are Multi-Mineral, metamorphic argilaceous rocks made of an aggregate of minerals and colloidal substances. Essentially mineral composition includes quartz, mica, chlorite, sericite & oxides of iron with occasional spots/knots of minerals like garnet, pyrite, andulasite, etc.

SiO2: 55-65%
Iron (Fe2O3): 4%-8%
Alumina (Al2O3): 15 to 20%
Soda (Na2O) & Potash (K2O): 2-4%
Lime (CaO): 0.5-1%
Magnesia (MgO): 0.5-3%
TiO2: 0.4-0.5%
Loss On Ignition (LOI): 3-4%

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