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