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