Know all about Hornfels and Claystone properties here. All properties of rocks are important as they define the type of rock and its application. Hornfels belongs to Metamorphic Rocks while Claystone belongs to Sedimentary Rocks.Texture of Hornfels is Granular, Platy whereas that of Claystone is Clastic. Hornfels appears Dull and Claystone appears Rough and Dull. The luster of Hornfels is shiny while that of Claystone is dull. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas Claystone is available in black, blue, brown, green, grey, orange, red, white, yellow colors. The commercial uses of Hornfels are cemetery markers, commemorative tablets, creating artwork and that of Claystone are pottery.