Characteristics related to grain size of rocks are called as texture. Here you can know more about texture of Hornfels and Rhyolite. Texture of Hornfels is Granular, Platy whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Based on the texture of rocks, they are used for various purposes. Get detailed information about Hornfels vs Rhyolite texture, color, appearance and maintenance in the next section.