Floors Restored                  

Natural Stone, Ceramic Tile, and Solid Floor Cleaning Specialists 

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GRANITE

Granite is a common and widely occurring type of intrusive, felsic, igneous rock. Granites usually have a medium- to coarse-grained texture. Occasionally some individual crystals are larger than the groundmass, in which case the texture is known asporphyritic. A granitic rock with a porphyritic texture is sometimes known as a porphyry. Granites can be pink to gray in color, depending on their chemistry and mineralogy. By definition, granite is an igneous rock with at least 20% quartz by volume. Granite differs from granodioritein that at least 35% of the feldspar in granite is alkali feldspar as opposed to plagioclase; it is the alkali feldspar that gives many granites a distinctive pink color. Outcrops of granite tend to form tors and rounded massifs. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels. Granite is usually found in the continental plates of the Earth's crust.  

Granite is nearly always massive (lacking internal structures), hard and tough, and therefore it has gained widespread use as a construction stone. The word granite comes from the Latin granum, a grain, in reference to the coarse-grained structure of such a crystalline rock.

  

Granite has been extensively used as a  dimension stone  and as flooring tiles in public and commercial buildings and monuments.  Aberdeen   in Scotland, which is constructed principally from local granite, is known as "The Granite City". Because of its abundance, granite was commonly used to build foundations for homes in  New England. The  Granite Railway, America's first railroad, was built to haul granite from the quarries inQuincy, Massachusetts, to the  Neponset River  in the 1820s. With increasing amounts of  acid rain  in parts of the world, granite has begun to supplant  marble  as a monument material, since it is much more durable. Polished granite is also a popular choice for  kitchen  countertops   due to its high durability and aesthetic qualities. In building and for countertops, the term "granite" is often applied to all igneous rocks with large crystals, and not specifically to those with a granitic composition.

 

 

 

 

 

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