Syenites are often named based upon the chief ferromagnesian mineral they contain. Thus, sodalite syenite is a type of syenite that contains appreciable amounts of sodalite, a sodium aluminosilicate mineral. This variety of rock may also include a wide array of other minerals, such as granconite, rutile, pyrite, and gypsum, but in smaller amounts. Relatively rare, sodalite syenite is typically lighter in color than more common varieties of the rock, generally exhibiting a pale gray to beige hue.