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