Know all about Obsidian and Borolanite properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian and Borolanite belong to Igneous Rocks.Texture of Obsidian is Glassy whereas that of Borolanite is Granular. Obsidian appears Shiny and Borolanite appears Banded and Foilated. The luster of Obsidian is vitreous while that of Borolanite is greasy to dull. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Borolanite is available in brown, buff, cream, green, grey, pink, white colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Borolanite are cemetery markers.