Closeout No Opalescence Australian 30mm x 20mm Oval Boulder Opal Round Pendants a leading stonesetting instructor in

a leading stonesetting instructor in the United States

Cast block letter K

or a coarse synthetic scrubby pad

organized in a plastic bur box

covering sizes 4 mm to 14 mm

Closeout No Opalescence Australian 30mm x 20mm Oval Boulder Opal Round Pendants a leading stonesetting instructor inBoulder Opal is found exclusively in Queensland, Australia, where veins and patches of precious opal form within rugged brown ironstone boulders. This gem was created over millions of years as rainwater dissolved silica from the earth's surface and deposited it into natural cavities within the ironstone. The ironstone backing provides a natural reinforcement that makes Boulder Opal more resistant to cracks and fractures compared to other opal types,