Know all about Peridotite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Peridotite and Obsidian belong to Igneous Rocks.Texture of Peridotite is Phaneritic whereas that of Obsidian is Glassy. Peridotite appears Rough and Shiny and Obsidian appears Shiny. The luster of Peridotite is shiny while that of Obsidian is vitreous. Peridotite is available in dark greenish - grey colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Peridotite are creating artwork, gemstone, jewelry, source of chromite, platinum, nickel and garnet, source of diamonds and that of Obsidian are creating artwork, mirror, used in aquariums.