Know all about Hornfels and Oil shale properties here. All properties of rocks are important as they define the type of rock and its application. Hornfels belongs to Metamorphic Rocks while Oil shale belongs to Sedimentary Rocks.Texture of Hornfels is Granular, Platy whereas that of Oil shale is Splintery. Hornfels appears Dull and Oil shale appears Muddy. The luster of Hornfels is shiny while that of Oil shale is dull. Hornfels is available in brown, dark greenish - grey, green, reddish brown colors whereas Oil shale is available in black, brown, buff, green, grey, red, yellow colors. The commercial uses of Hornfels are cemetery markers, commemorative tablets, creating artwork and that of Oil shale are an oil and gas reservoir.