A round green-blue boulder opal, which is a perfect ring size.

• 13.52 carats.
• ~17.5 x 17.5 mm / 0.68 x 0.68".
• 5.6 mm / 0.22" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Has a rounded back.
• Commercial grade.