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Slate & Quartzite 2017-05-16T12:50:35+00:00

OUR SLATE & QUARTZITE
COLLECTION

Take a look at some of the handpicked varieties of high quality slates and quartzite from our huge collection.

Red Quartzite

RED

Red Movement Quartzite

RED MOVEMENT

Light Brown Quartzite

LIGHT BROWN

Grey Quartzite

GREY

Grey Movement Quartzite

GREY MOVEMENT

Buff Grey Quartzite

BUFF GREY

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We take pleasure in supplying all kind of stones in custom size and finishing. So if you are looking for something exclusive and different, let us know. We can get you just about anything.

Read More About Slate & Quartzite :

Slate –

Slates are dense and fine grained rock. The colour of slates are generally gray, red, brown and green ranging from dark to light. It is produced by the compression of clays, shale, and various other rocks developing a characteristic cleavage consisting sericite and quartz with biotite, chlorite, and hematite as principal accessories.

In other words slates are generally formed by low-grade regional metamorphism of pelithic sediments or fine-grained tuffs. It can be associated with other metamorphic sedimentary or volcanic rocks.

Slates are or argillaceous origin of metamorphic rocks and can also be defined as a layered stone. Fossils may be sometimes preserved in slate but are invariably distorted. Folds are often apparent in the field. Too fine-grained are tough to distinguished with the naked eye.

Quartzite – 

The parent rock for quartzite is quartz-rich sandstone. As sandstone becomes deeply buried, rising temperature will fuse the quartz grains together forming the extremely hard and weather-resistant rock quartzite. Like marble, quartzite comes in many colors, but when pure it is light-colored. Quartzite tends to have a sugary appearance, and when broken the fractures cut through the sand grains, not around them as with a sandstone.

Use of Slate & Quartzite :

  • Slate is used as Stepping and Paving stone in garden
  • Slate is also used in Picture frame, clocks, jewellery, mirrors, coasters, trivets, switch plates, candle holders.
  • Square blocks for a break band in section of granite paving is made with slate stone.
  • Quartzite is usually dyed to some pleasing color  or otherwise fashioned into decorative items.

Physical Properties of Slate & Quartzite :

Physically Slates 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.

Quartzite on the other hand are very Hard, Compact, Fine grained, equi-granular homogeneous rocks of metamorphic nature.

Slate Quartzite
Hardness 3 to 4 on Moh’s Scale 6.5 to 7 on Moh’s Scale
Density 2.6 to 2.8 Kg/cm3 2.3 to 2.4 Kg/cm3
Compressive Strength 24 to 36 N/mm2 90 to 140 N/mm2
Modulus of Rupture  22 to 34 N/mm2 16 to 40 N/mm2
Water Absorption 1.5 to 2% 1.0 – 1.2 %
Porosity Low to very low Low to very low
Weather Impact Resistant Resistant

Chemical Properties of Slate & Quartzite :

Chemically Marbles are crystalline rocks composed predominantly of calcite, dolomite or serpentine minerals. The other minor constituents vary from origin to origin

Slate Quartzite
Lime (CaO) 55-65% 95-97%
Iron (Fe2O3) 4%-8% 0.5%-1.5%
Alumina (Al2O3) 15 to 20% 1 to 1.5%
Soda (Na2O) & Potash (K2O) 2-4% Less then 1%
Lime (CaO) 0.5-1% Less then 0.5%
Magnesia (MgO) 0.5-3% Less then 0.5%
TiO2 0.4-0.5%  –Not Applicable–
Loss On Ignition (LOI) 3-4% Less then 0.5%