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