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