Know all about Oil shale and Nepheline Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Oil shale belongs to Sedimentary Rocks while Nepheline Syenite belongs to Igneous Rocks.Texture of Oil shale is Splintery whereas that of Nepheline Syenite is Granular. Oil shale appears Muddy and Nepheline Syenite appears Banded and Foilated. The luster of Oil shale is dull while that of Nepheline Syenite is greasy to dull. Oil 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 Oil shale are an oil and gas reservoir and that of Nepheline Syenite are cemetery markers, creating artwork.