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