Know all about Obsidian and Scoria properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian and Scoria belong to Igneous Rocks.Texture of Obsidian is Glassy whereas that of Scoria is Vesicular. Obsidian appears Shiny and Scoria appears Glassy and Vesicular. The luster of Obsidian is vitreous while that of Scoria is subvitreous to dull. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Scoria is available in black, brown, dark grey to black, red colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Scoria are as a traction material on snow-covered roads, creating artwork, high-temperature insulation, in gas barbecue grills.