Know all about Obsidian and Basalt properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian and Basalt belong to Igneous Rocks.Texture of Obsidian is Glassy whereas that of Basalt is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular. Obsidian appears Shiny and Basalt appears Dull and Soft. The luster of Obsidian is vitreous while that of Basalt is not available. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Basalt is available in black, brown, light to dark grey colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Basalt are an oil and gas reservoir, commemorative tablets, creating artwork, used in aquariums.