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