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