A set of three small boulder opals with a great variation in colours and shapes.

• 6.20 carats (total).
• Left, 9.3 x 6.6 mm / 0.36" x 0.25".
• 2.4 mm / 0.09" thick.
• Middle, 11.7 x 5.3 mm / 0.46" x 0.20".
• 3 mm / 0.11" thick.
• Right, 12.4 x 7.9 mm / 0.48" x 0.31".
• 43.1 mm / 0.12" thick.
• Natural solid boulder opals.
  
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.