Know all about Obsidian and Taconite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian belongs to Igneous Rocks while Taconite belongs to Sedimentary Rocks.Texture of Obsidian is Glassy whereas that of Taconite is Banded, Trellis. Obsidian appears Shiny and Taconite appears Layered, Banded, Veined and Shiny. The luster of Obsidian is vitreous while that of Taconite is earthy. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Taconite is available in red, reddish brown colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Taconite are as a touchstone, cemetery markers, creating artwork.