Know all about Obsidian and Variolite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian and Variolite belong to Igneous Rocks.Texture of Obsidian is Glassy whereas that of Variolite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Obsidian appears Shiny and Variolite appears Dull and Soft. The luster of Obsidian is vitreous while that of Variolite is not available. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Variolite is available in black, brown, light to dark grey colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Variolite are cemetery markers, creating artwork.