Know all about Gritstone and Nepheline Syenite properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Nepheline Syenite belongs to Igneous Rocks.Texture of Gritstone is Earthy whereas that of Nepheline Syenite is Granular. Gritstone appears Layered and Foliated and Nepheline Syenite appears Banded and Foilated. The luster of Gritstone is dull while that of Nepheline Syenite is greasy to dull. Gritstone is available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow colors whereas Nepheline Syenite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Gritstone are an oil and gas reservoir, as a feed additive for livestock, gemstone, metallurgical flux, production of lime, soil conditioner, source of magnesia (mgo), tombstones and that of Nepheline Syenite are cemetery markers, creating artwork.