4.28 Ct small boulder opal
A small triangle boulder opal with lovely greens and blues.
- 4.28 carats.
- 19 x 9.9 mm / 0.74 x 0.38".
- 3 mm / 0.11" thick.
- Natural solid boulder opal.
- Mined by Sue at her Mt. Margaret opal mine in Queensland, Australia.
- Commercial grade.
Vendor: Broken River Mining