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