Know all about Obsidian and Oolite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian belongs to Igneous Rocks while Oolite belongs to Sedimentary Rocks.Texture of Obsidian is Glassy whereas that of Oolite is Clastic or Non-Clastic. Obsidian appears Shiny and Oolite appears Rounded and Rough. The luster of Obsidian is vitreous while that of Oolite is pearly to shiny. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Oolite is available in black, blue, brown, cream, green, grey, pink, red, silver, white, yellow colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Oolite are creating artwork, jewelry, used in aquariums.