Know all about Obsidian and Diamictite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian belongs to Igneous Rocks while Diamictite belongs to Sedimentary Rocks.Texture of Obsidian is Glassy whereas that of Diamictite is Clastic. Obsidian appears Shiny and Diamictite appears Banded. The luster of Obsidian is vitreous while that of Diamictite is grainy, pearly and vitreous. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Diamictite is available in brown, buff colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Diamictite are commemorative tablets, creating artwork, production of lime.