Know all about Shale and Nepheline Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Shale belongs to Sedimentary Rocks while Nepheline Syenite belongs to Igneous Rocks.Texture of Shale is Clastic, Splintery whereas that of Nepheline Syenite is Granular. Shale appears Muddy and Nepheline Syenite appears Banded and Foilated. The luster of Shale is dull while that of Nepheline Syenite is greasy to dull. Shale is available in black, brown, buff, green, grey, red, yellow colors whereas Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Shale are creating artwork, pottery and that of Nepheline Syenite are cemetery markers, creating artwork.