Know all about Obsidian and Breccia properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian belongs to Igneous Rocks while Breccia belongs to Sedimentary Rocks.Texture of Obsidian is Glassy whereas that of Breccia is Brecciated, Clastic. Obsidian appears Shiny and Breccia appears Layered, Banded, Veined and Shiny. The luster of Obsidian is vitreous while that of Breccia is dull to pearly. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Breccia is available in beige, black, blue, brown, buff, green, grey, orange, pink, purple, red, rust, white, yellow colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Breccia are creating artwork, gemstone, jewelry.