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