A wonderful free-form bright blue boulder opal. One of our current favourites.

• 4.07 carats.
• 12.7 x 11.3 mm / 0.50 x 0.44".
• 3.3 mm / 0.13" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.
• Opal ID 2670.