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