Know all about Skarn and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Skarn belongs to Metamorphic Rocks while Obsidian belongs to Igneous Rocks.Texture of Skarn is Earthy, Mud-rich, Rough whereas that of Obsidian is Glassy. Skarn appears Dull and Obsidian appears Shiny. The luster of Skarn is waxy and dull while that of Obsidian is vitreous. Skarn is available in black, brown, colourless, green, grey, white colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Skarn are creating artwork, gemstone, jewelry, metallurgical flux, source of magnesia (mgo) and that of Obsidian are creating artwork, mirror, used in aquariums.