Closeout Assorted Bag of 3 Australian Boulder Opals Otto Frei Slightly radiused stamp face designed

Slightly radiused stamp face designed for stamping the interior of rings

and finishing applications

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

Jewelry-quality fine silver — not medical-grade material

Closeout Assorted Bag of 3 Australian Boulder Opals Otto Frei Slightly radiused stamp face designedBoulder 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