Rainbow obsidian is a lightweight volcanic glass with iridescent properties, giving it a subtle cat's eye glow in sunlight. Every movement reveals a subtle sheen, with muted rainbow colors moving on the stone. Microscopic crystals and bubbles of mica in the volcanic glass create the multicolored effect.
Beads>Grade B>Rainbow ObsidianBeadsGrade BRainbow ObsidianBlacksFlat Round/Coin12mmNaturalhttp://www.firemountaingems.com/itemdetails/h208248gsH208248GSBead, rainbow obsidian (natural), 12mm flat round, B grade, Mohs hardness 5 to 5-1/2. Sold per 16-inch strand.//image1.fmgstatic.com/images/p8248gsb.jpg17.8217.82As Low As $9.12 per strand