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