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