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Granite is classified as an igneous rock. It is formed
when hot magma from the earth's core cools very slowly and
crystallizes. The mineral grains that are formed are large enough
to be clearly distinguishable; interlocked like pieces of a jigsaw
puzzle. This is what makes Granite very strong and durable - ideal for
building and construction.
Granitic rock makes up a large part of every
continent on this earth. Its main mineral ingredients - quartz,
alkali and plagioclase feldspar, hornblende and biotite mica will
- determine (by and large) its colour.
On rare occasions, such as volcanic eruptions, the granitic
magma cools too quickly to form large crystals. The resulting
rock, called rhyolite, has the same mineral composition as
granite but is fine grained.
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