Boulder 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 Boulder Opal more resistant to cracks and fractures compared to other opal types. Each assorted bag contains 3 Australian Boulder Opals sourced from rough originated near the city of Cunnamulla, Australia, with at least one stone per bag exhibiting higher opalescence.
Care instructions: Clean with warm, soapy water only. Avoid ultrasonic cleaners, steam cleaners, and any sudden or rapid heat changes.
Features
- Each bag contains 3 Australian Boulder Opals
- At least one opal per bag features higher opalescence
- Opaque stones with natural ironstone backing for added durability
- Shapes include rectangles, rounds, triangles, and free-form
- Sizes range from approximately 21 x 7 mm (rectangle) to 24 x 24 mm (square)
- No treatments applied
- Rough originated near Cunnamulla, Queensland, Australia
Specifications
| Stone Type |
Australian Boulder Opal |
| Origin |
Cunnamulla, Queensland, Australia |
| Transparency |
Opaque |
| Treatment |
None (N) |
| Backing |
Natural ironstone |
| Shapes |
Rectangles, rounds, triangles, free-form |
| Size Range |
21 x 7 mm – 24 x 24 mm (approximate) |
| Quantity |
3 opals per bag |
Notes
- These are natural gemstones; color, pattern, shape, and size will vary from piece to piece.
- Do not clean with ultrasonic or steam cleaners.
- Avoid sudden or rapid heat changes, which can damage the stone.
