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