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