Granite is an Igneous Stone and there are different types of granite depending on the percentage mix of quartz, mica and felspar. It comes in many different colors. Granite is available in three main varieties biotite-granite, hornblende-granite, and tourmaline-granite. Biotite-granite is made of quartz, plagioclase, biotite and K-feldspar. Hornblende-granite contains hornblende as well as mica.
. Tourmaline-granite is mainly of Tourmaline and has a wide range of colors and is very rarely available as white or colorless variety. To read more on the different types of granite visit: http://www.granite-sandstone.com/varieties-of-granite.html.