Granite is an intrusive igneous rock, which means it was formed slowly under the surface of the Earth as a mixture of quartz (white), feldspar (pink) and mica (black) crystals. As a result of slow cooling, it has large crystals that can be seen very easily.

White Granite

Granite is one of the most wide-spread rocks on the planet, but remains mostly under the surface. It may contain any of these minerals: magnetite, apatite, pyrite, muscovite mica, hornblende, pyroxine and garnet

Its color may be white, light gray, pink, yellowish and, more rarely, greenish when altered.