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