Know all about Troctolite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Troctolite and Obsidian belong to Igneous Rocks.Texture of Troctolite is Phaneritic whereas that of Obsidian is Glassy. Troctolite appears Veined and Shiny and Obsidian appears Shiny. The luster of Troctolite is not available while that of Obsidian is vitreous. Troctolite is available in dark grey to black colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Troctolite are cemetery markers, commemorative tablets, laboratory bench tops, jewelry, sea defence, tombstones and that of Obsidian are creating artwork, mirror, used in aquariums.