Granite (pronounced: gran-it)

Granite is a coarse-grained, intrusive, igneous rock with the major minerals being quartz, feldspar, and mica. Most of the minerals in granite are light colored, although potassium feldspar can be a dark pink. Mica can either be light (muscovite) or dark (biotite). As a result granite is commonly light grey or pink with small dark spots.

Granite forms from magma that cools deep within the crust (2 to 50 km) as large batholiths. It most commonly forms in areas of convergent tectonic plates.

Granophyre is a finely crystaline type

Information provided by Patrick M. Colgan, Northeastern University
http://www.casdn.neu.edu