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