Know all about Diorite and Nepheline Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Diorite and Nepheline Syenite belong to Igneous Rocks.Texture of Diorite is Phaneritic whereas that of Nepheline Syenite is Granular. Diorite appears Shiny and Nepheline Syenite appears Banded and Foilated. The luster of Diorite is shiny while that of Nepheline Syenite is greasy to dull. Diorite is available in black, brown, light to dark grey, white colors whereas Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Diorite are creating artwork, curling and that of Nepheline Syenite are cemetery markers, creating artwork.