A beautiful free-form boulder opal with an unusual pink and blue swirls.

• 6.14 carats.
• 18.1 x 8.9 mm / 0.71 x 0.35".
• 3.4 mm / 0.13" thick.
• Natural solid boulder opal.
• Mined by Sue at her Russell's opal mine in Queensland, Australia.
• Commercial grade.
  
• Opal ID 2975.