Know all about Gritstone and Hornfels properties here. All properties of rocks are important as they define the type of rock and its application. Gritstone belongs to Sedimentary Rocks while Hornfels belongs to Metamorphic Rocks.Texture of Gritstone is Earthy whereas that of Hornfels is Granular, Platy. Gritstone appears Layered and Foliated and Hornfels appears Dull. The luster of Gritstone is dull while that of Hornfels is shiny. 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 Hornfels is available in brown, dark greenish - grey, green, reddish brown 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 Hornfels are cemetery markers, commemorative tablets, creating artwork.