Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal NotFreeShipEligable incidental

incidental

4-prong round solitaire head designed for a 5 mm center stone

Shipping weight exceeds the listed net weight of 1

Compatible Thread Standards 3mm and 1/8-48 US threads Material Heat-treated steel with black oxide finish Maximum Speed 5

Closeout No Opalescence Australian 25mm x 18mm Oval Boulder Opal NotFreeShipEligable incidentalBoulder 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