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