570 Ct green-blue boulder opal specimen
A boulder opal specimen with lovely ocean colours flowing throughout the host rock, with a little caramel too.
- 570 carats / 114 grams
- 53.2 x 45.2 mm / 2.09" x 1.78".
- 25 mm / 0.98" thick.
- Natural solid boulder opal specimen.
- Mined by Sue at her Mt Margaret opal mine in Queensland, Australia.
- Sits on its flat base.