Granite

Granite is a common and generally occurring type of intrusive, felsic, igneous rock.
Granites are frequently 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 gray or even black, depending on their chemistry and mineralogy.
Outcrops of granite tend to form tors, rounded massifs, and terrains of smoothed boulders cropping out of flat, sandy soils. Granites sometimes take place 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 building stone.
The word granite comes from the Latin granum, a grain, in situation to the coarse-grained structure of such a crystalline rock.