Intrusive igneous rock
Intrusive igneous rock forms when the magma cools inside of the earth. Some of the magma may go on the Earth’s surface, but most traps inside of the earth, where it cools very slowly. Intrusive rocks have a rough grained texture.
http://geology.com/rocks/pictures/quartz-diorite.jpg
http://geology.com/rocks/pictures/quartz-diorite.jpg
http://marlimillerphoto.com/images/Ig-08.jpg