Know all about Tuff and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Tuff and Obsidian belong to Igneous Rocks.Texture of Tuff is Clastic, Pyroclastic whereas that of Obsidian is Glassy. Tuff appears Dull, Vesicular and Foilated and Obsidian appears Shiny. The luster of Tuff is vitreous to dull while that of Obsidian is vitreous. Tuff is available in brown, grey, yellow colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Tuff are creating artwork and that of Obsidian are creating artwork, mirror, used in aquariums.