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

Boulder 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 and fractures compared to other opal varieties.

This particular stone is classified as No Opalescence, meaning it contains none of the characteristic color play associated with precious opal. Each stone's pattern remains entirely unique and visually distinctive — simply without the flashes of color. The rough for this stone originated near the city of Cunnamulla, Queensland.

Features

• Australian Boulder Opal with ironstone backing for natural structural reinforcement
• No opalescence — zero color play, with a unique and individual surface pattern
• Rough originated near Cunnamulla, Queensland, Australia
• Opaque appearance
• Treatment: None (N) — completely untreated
• More resistant to cracks and fractures than other opal types due to ironstone backing

Specifications

Notes

Clean with warm, soapy water only. Avoid ultrasonic cleaners, steam cleaners, and sudden or rapid heat changes. This item is offered as a closeout — available while supplies last.

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.