Know all about Obsidian and Rhyolite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian and Rhyolite belong to Igneous Rocks.Texture of Obsidian is Glassy whereas that of Rhyolite is Aphanitic, Glassy, Porphyritic. Obsidian appears Shiny and Rhyolite appears Banded. The luster of Obsidian is vitreous while that of Rhyolite is earthy. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Rhyolite is available in grey, white, light black colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Rhyolite are gemstone, laboratory bench tops, jewelry.