Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal Specials 0mm 36C-82 18K Yellow 11

0mm 36C-82 18K Yellow 11

Square – Large: jaws measure 13mm and 9

Compatible with fixed dovetail mounts or GRS Slide & Lock systems for adjustable work height

and half-pear

Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal Specials 0mm 36C-82 18K Yellow 11Boulder Opal is found exclusively in Queensland, Australia, where veins and patches of precious opal form within rugged brown ironstone boulders. This gem developed over millions of years as rainwater dissolved silica from the earth's surface and deposited it into natural cavities within the ironstone. The result is a stone of exceptional durability the ironstone backing provides natural reinforcement that makes Boulder Opal more resistant to cracks