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 A>Rainbow ObsidianBeadsGrade ARainbow ObsidianBlacksFlat Round/Coin25mm & UpNaturalhttp://www.firemountaingems.com/itemdetails/h209205gsH209205GSBead, rainbow obsidian (natural), 30mm flat round, A grade, Mohs hardness 5 to 5-1/2. Sold per 16-inch strand.//image1.fmgstatic.com/images/p9205gsb.jpg93.3693.36As Low As $52.73 per strand