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