Know all about Obsidian and Granodiorite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian and Granodiorite belong to Igneous Rocks.Texture of Obsidian is Glassy whereas that of Granodiorite is Granular, Phaneritic. Obsidian appears Shiny and Granodiorite appears Veined or Pebbled. The luster of Obsidian is vitreous while that of Granodiorite is grainy, pearly and vitreous. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Granodiorite is available in black, grey, orange, pink, white colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Granodiorite are curling, gemstone, laboratory bench tops, tombstones.