Know all about Obsidian and Metapelite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian belongs to Igneous Rocks while Metapelite belongs to Metamorphic Rocks.Texture of Obsidian is Glassy whereas that of Metapelite is Foliated. Obsidian appears Shiny and Metapelite appears Banded. The luster of Obsidian is vitreous while that of Metapelite is earthy. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Metapelite is available in dark greenish - grey, green, light green, light greenish grey colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Metapelite are commemorative tablets, creating artwork.