Know all about Obsidian and Pumice properties here. All properties of rocks are important as they define the type of rock and its application. Obsidian and Pumice belong to Igneous Rocks.Texture of Obsidian is Glassy whereas that of Pumice is Vesicular. Obsidian appears Shiny and Pumice appears Vesicular. The luster of Obsidian is vitreous while that of Pumice is earthy. Obsidian is available in black, blue, brown, green, orange, red, tan, yellow colors whereas Pumice is available in beige, colourless, grey, light green, light grey, pink, white, yellow- grey colors. The commercial uses of Obsidian are creating artwork, mirror, used in aquariums and that of Pumice are as a traction material on snow-covered roads, as an abrasive in pencil erasers, fine abrasive used for polishing, manufacture of soap, solvents, dyes, plastics and fibres, used in aquariums.