Know all about Mylonite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Mylonite belongs to Metamorphic Rocks while Obsidian belongs to Igneous Rocks.Texture of Mylonite is Foliated whereas that of Obsidian is Glassy. Mylonite appears Dull, Banded and Foilated and Obsidian appears Shiny. The luster of Mylonite is shiny while that of Obsidian is vitreous. Mylonite is available in black to grey colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Mylonite are creating artwork, gemstone, jewelry and that of Obsidian are creating artwork, mirror, used in aquariums.