Know all about Theralite and Nepheline Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Theralite and Nepheline Syenite belong to Igneous Rocks.Texture of Theralite is Phaneritic whereas that of Nepheline Syenite is Granular. Theralite appears Veined and Shiny and Nepheline Syenite appears Banded and Foilated. The luster of Theralite is waxy and dull while that of Nepheline Syenite is greasy to dull. Theralite is available in dark grey to black colors whereas Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Theralite and Nepheline Syenite are cemetery markers, commemorative tablets, creating artwork, laboratory bench tops, jewelry, sea defence, tombstones.