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