A small free-form boulder opal with rainbow colours.

• 3.95 carats.
• 19.7 x 6.9 mm / 0.77 x 0.27".
• 3.4 mm / 0.13" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.
  
• Opal ID 2974.