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