An extra large geometric boulder opal with bright rainbow colours.

• 31.32 carats.
• 54.6 x 14 mm / 2.14 x 0.55".
• 5.7 mm / 0.22" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.
• Opal ID 2992.