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