The manner in which light reflects from the surface of a mineral. Metallic, submetallic and non-metallic are the basic types of luster. Other types of luster include: vitreous, dull, resinous, adamantine, earthy, pearly, greasy, silky, and waxy. The intensity of luster is often described in simple terms such as bright or dull. In the photo are specimens of tumble-polished hematite with a bright metallic luster.