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Granite, igneous rock of visible crystalline
formation and texture. It is composed of feldspar (usually potash
feldspar and oligoclase) and quartz, with a small amount of mica
(biotite or muscovite) and minor accessory minerals, such as zircon,
apatite, magnetite, ilmenite, and sphene.
Granite is usually whitish or grey with a speckled appearance caused
by the darker crystals. Potash feldspar imparts a red or flesh colour
to the rock. Granite crystallizes from magma that cools slowly, deep
below the Earth's surface. Exceptionally slow rates of cooling give
rise to a very coarse-grained variety called pegmatite. Granite,
along with other crystalline rocks, constitutes the foundation of
the continental masses.
The relative density of granite ranges from 2.63 to 2.75. Its crushing
strength is from 1,050 to 14,000 kg per sq cm (15,000 to 20,000 lb
per sq in). Granite has greater strength than sandstone, limestone,
and marble and is correspondingly more difficult to quarry. It is
an important building stone, the best grades being extremely resistant
to weathering.
Granite is particularly widespread in India , and is available in
various colours , we at MilkywaySource the granite from the quarry
depending upon the colour . we give below the various colours that
can be Microsoft offered from India .
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