Gran-ite (gran'it) n. a coarse-grained igneous rock composed chiefly of orthoclase and albite 
feldspars and of quartz, usu. with lesser amounts of one or more other minerals, as mica, hornblende, or augite.

Granite (encyclopedia)
Granite is a common and widely-occurring type of intrusive felsic igneous rock.

Granites are usually a white or buff colour and are medium to coarse grained, occasionally with some individual crystals larger than the groundmass forming a rock known as porphyry. Granites can be pink to dark grey or even black, depending on their chemistry and mineralogy.

Outcrops of granite tend to form tors, rounded massifs, and terrains of rounded boulders cropping out of flat, sandy soils. Granites sometimes occur in circular depressions surrounded by a range of hills, formed by the metamorphic aureole or hornfels.

Granite is nearly always massive, hard and tough, and it is for this reason it has gained widespread use as a construction stone.

The average density of granite is 2.75 g/cm3; with a range of 1.74 to 2.80.

The word granite comes from the Latin granum, a grain, in reference to the coarse-grained structure of such a crystalline rock.

>Granite Catalogue



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