Know all about Gritstone and Gneiss properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Gneiss belongs to Metamorphic Rocks.Texture of Gritstone is Earthy whereas that of Gneiss is Banded, Foliated, Platy. Gritstone appears Layered and Foliated and Gneiss appears Foliated. The luster of Gritstone and Gneiss is dull. Gritstone and Gneiss are available in beige, black, brown, colourless, cream, dark brown, green, grey, light green, light to dark grey, pink, red, white, yellow 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 Gneiss are cemetery markers, jewelry, tombstones, used in aquariums.