Know all about Foidolite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Foidolite and Obsidian belong to Igneous Rocks.Texture of Foidolite is Earthy whereas that of Obsidian is Glassy. Foidolite appears Dull and Obsidian appears Shiny. The luster of Foidolite is subvitreous to dull while that of Obsidian is vitreous. Foidolite is available in black, brown, colourless, green, grey, pink, white colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Foidolite are cemetery markers, commemorative tablets, creating artwork and that of Obsidian are creating artwork, mirror, used in aquariums.