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