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 ObsidianBlacksBall4mmNaturalhttp://www.firemountaingems.com/itemdetails/h208964gsH208964GSBead, rainbow obsidian (natural), 4mm round, B grade, Mohs hardness 5 to 5-1/2. Sold per 16-inch strand.//image1.fmgstatic.com/images/p8964gsb.jpg12.9912.99As Low As $6.68 per strand