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