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