4.20 Ct small, green-blue boulder opal
A small, free-form boulder opal with green-blue opal running down one side that contrasts beautifully with the host rock.
- 4.20 carats.
- 15 x 8.4 mm / 0.59" x 0.33".
- 4.1 mm / 0.16" thick.
- Natural solid boulder opal.
- Mined by Sue at her Mt. Margaret opal mine in Queensland, Australia.
- Commercial grade.
Vendor: Broken River Mining