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