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