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