Closeout Higher Opalescence Australian 30mm x 20mm Oval Boulder Opal

Boulder Opal is exclusively found in Queensland, Australia, where veins and patches of precious opal form within rugged brown ironstone boulders. This stunning gem was created over millions of years ago when rainwater dissolved silica from the earth's surface, depositing it into natural cavities within the ironstone. As a result, Boulder Opals boasts exceptional durability, with it's ironstone backing providing a natural reinforcement that makes it more resistant to cracks and fractures compared to other opals. Clean with warm, soapy water. Avoid use of ultrasonic, steam cleaner and any sudden rapid heat changes. 

Sold by the piece.

• Opaque
• Treatment: None (N)
• Rough originated near the city of Cunnamulla 

Higher Opalescence has been selected from our lot to contain the most opalescence, the opalescence can be incorporated in patterns or distributed throughout the gemstone. Opalescence is about 5-10% of the gemstones surface with primary hues of purple and greens.