4.87 Ct rainbow boulder opal
A rectangle boulder opal with plenty of rainbow colours.
- 4.87 carats.
- 16.4 x 8.9 mm / 0.64" x 0.35".
- 3.8 mm / 0.14" thick.
- Natural solid boulder opal.
- Mined by Sue at her Yaraka opal mine in Queensland, Australia.
- Commercial grade.
Vendor: Broken River Mining