4.53 Ct small boulder opal

A small free-form boulder opal with some lovely rainbow colours.

• 4.53 carats.
• 15.7 x 9.1 mm / 0.61" x 0.35".
• 3.6 mm / 0.14" thick.
• Natural solid boulder opal.
• Mined by Sue at her Mt. Margaret opal mine in Queensland, Australia.
• Commercial grade.