Closeout No Opalescence Australian 10mm x 8mm Oval Boulder Opal Speed Brite Their outstanding resistance to wear

Their outstanding resistance to wear makes them more economical to use than comparable abrasive tools

TXR variable-speed foot control enables fine adjustments for delicate and detail work

visible presentation

Setting Style Extra Heavy Round Double Gallery 4-Prong Cast Metal Options 14K Yellow Gold

Closeout No Opalescence Australian 10mm x 8mm Oval Boulder Opal Speed Brite Their outstanding resistance to wearBoulder 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, depositing it into natural cavities within the ironstone. The ironstone backing provides natural reinforcement that makes Boulder Opal more resistant to cracks and fractures compared to other opals. This