Granite is a well-known igneous rock, composed principally of three minerals, Quartz, Felspar and Mica, united in a confused crystallization, that is, without any regular arrangement of the crystals. The following is the order in which the ingredients are proportioned: Felspar, Quartz, Mica. The name of the stone is derived from its granular formation.

There are very many kinds of granite used in the arts. Amongst these are the gray, red, green, violet, rose-colored, etc.

For the gray granite the ground is a gray, mixed of black and white, and, over this, spots are to be splashed with black and white, used separately, the work being carried on as described in relation to Porphyry. For the various shades of red granite the ground is composed of Venetian red and white, the spots being black, white and vermilion. In the same way any of the other kinds may be represented.