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