Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal Kagan bringing the zoom range from

bringing the zoom range from the standard 5X–30X down to 3

Medium grit diamond polishing wheel for scratch removal on stones

variable speed

The clean white surface provides high contrast against small components

010 jewelers workbench

Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal Kagan bringing the zoom range fromBoulder 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