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 ObsidianBlacksOval16mmNaturalhttp://www.firemountaingems.com/itemdetails/h209206gsH209206GSBead, rainbow obsidian (natural), 16x12mm flat oval, A grade, Mohs hardness 5 to 5-1/2. Sold per 15-1/2" to 16" strand.//image1.fmgstatic.com/images/p9206gsb.jpg45.5145.51As Low As $23.26 per strand