A beautiful and unique Yowah nut cabochon which has twin pools of gem opal in ironstone, making it very strong. I've never seen this pattern before, so this one is very special. What looks like a fracture in the picture is internal, stable, and was not noticeable prior to this photograph - so much less obvious in person. A good size for a pendant at 20x13x3mm and much nicer in the hand. Enjoy!