Know all about Diorite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Diorite and Obsidian belong to Igneous Rocks.Texture of Diorite is Phaneritic whereas that of Obsidian is Glassy. Diorite appears Shiny and Obsidian appears Shiny. The luster of Diorite is shiny while that of Obsidian is vitreous. Diorite is available in black, brown, light to dark grey, white colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Diorite are creating artwork, curling and that of Obsidian are creating artwork, mirror, used in aquariums.