Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal Kagan The included 13W bulb (113

The included 13W bulb (113

4mm Small Ring Width 1

Medium grit diamond polishing wheel for scratch removal on stones

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

Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal Kagan The included 13W bulb (113Boulder 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