Know all about Diorite and Hornfels properties here. All properties of rocks are important as they define the type of rock and its application. Diorite belongs to Igneous Rocks while Hornfels belongs to Metamorphic Rocks.Texture of Diorite is Phaneritic whereas that of Hornfels is Granular, Platy. Diorite appears Shiny and Hornfels appears Dull. The luster of Diorite and Hornfels is shiny. Diorite is available in black, brown, light to dark grey, white colors whereas Hornfels is available in brown, dark greenish - grey, green, reddish brown colors. The commercial uses of Diorite are creating artwork, curling and that of Hornfels are cemetery markers, commemorative tablets, creating artwork.