Know all about Nephelinite and Obsidian properties here. All properties of rocks are important as they define the type of rock and its application. Nephelinite and Obsidian belong to Igneous Rocks.Texture of Nephelinite is Aphanitic whereas that of Obsidian is Glassy. Nephelinite appears Skeletal and Obsidian appears Shiny. The luster of Nephelinite is vitreous to metallic while that of Obsidian is vitreous. Nephelinite is available in black, brown, colourless, green, grey, white colors whereas Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors. The commercial uses of Nephelinite are creating artwork, soil conditioner, source of magnesia (mgo) and that of Obsidian are creating artwork, mirror, used in aquariums.