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