Closeout Assorted Bag of 3 Australian Boulder Opals Otto Frei Full size progression for versatile

Full size progression for versatile doming and forming work

000 BTU (38

and finishing applications

Made from natural Arkansas black novaculite – quarried and cut in the USA

Closeout Assorted Bag of 3 Australian Boulder Opals Otto Frei Full size progression for versatileBoulder 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, depositing it into natural cavities within the ironstone. The result is a gemstone of exceptional character and exceptional durability. The ironstone backing provides natural reinforcement that makes