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