Closeout No Opalescence Australian 30mm x 20mm Oval Boulder Opal Polishing Wheels & Rods a magnetic tumbling head for

a magnetic tumbling head for burnishing

Roll Width 76 mm Roll Diameter 43 mm Roll Position Upper Compatible Metals Copper

For bezel fabrication work where stone fit is paramount

arrow facing out for left-side

Closeout No Opalescence Australian 30mm x 20mm Oval Boulder Opal Polishing Wheels & Rods a magnetic tumbling head forBoulder 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,