Closeout Some Opalescence Australian 30mm x 20mm Oval Boulder Opal Pinstems & Components By counting hammer blows on

By counting hammer blows on the first side and repeating the same number on the second

Rubber feet prevent slipping on the bench surface

Flat opposite horn includes a 3

guaranteed based on personal knowledge and written guarantee provided by the supplier

they offer comfortable control at the bench

Closeout Some Opalescence Australian 30mm x 20mm Oval Boulder Opal Pinstems & Components By counting hammer blows onBoulder Opal is found exclusively in Queensland, Australia, where veins and patches of precious opal form within rugged brown ironstone boulders. These gems were 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 natural reinforcement, making Boulder Opal more resistant to cracks and fractures compared to other opal varieties.