12 Facts About Granite


Granite is typical of a larger family of granitic rocks, or granitoids, that are composed mostly of coarse-grained quartz and feldspars in varying proportions.

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Granite has poor primary permeability overall, but strong secondary permeability through cracks and fractures if they are present.

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Granite is a natural source of radiation, like most natural stones.

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Granite and related marble industries are considered one of the oldest industries in the world, existing as far back as Ancient Egypt.

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Granite became "an integral part of the Roman language of monumental architecture".

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Granite is a hard stone and requires skill to carve by hand.

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Granite has been extensively used as a dimension stone and as flooring tiles in public and commercial buildings and monuments.

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Granite tables are used extensively as bases or even as the entire structural body of optical instruments, CMMs, and very high precision CNC machines because of granite's rigidity, high dimensional stability, and excellent vibration characteristics.

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Granite block is usually processed into slabs, which can be cut and shaped by a cutting center.

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Granite is one of the rocks most prized by climbers, for its steepness, soundness, crack systems, and friction.

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Granite rock climbing is so popular that many of the artificial rock climbing walls found in gyms and theme parks are made to look and feel like granite.

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Granite was used for setts on the St Louis riverfront and for the piers of the Eads Bridge .

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