A medium free-form green, blue and ironstone boulder opal.

• 8.17 carats.
• 23.6 x 14.2 mm / 0.92" x 0.55".
• 3.6 mm / 0.14" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.