A set of two small blue boulder opals.

• 7.47 carats (total).
• Left, 11.9 x 10.6 mm / 0.46" x 0.41".
• 3.3 mm / 0.12" thick.
• Right, 15.2 x 9.7 mm / 0.59" x 0.38".
• 2.6 mm / 0.10" thick.
• Natural solid boulder opals.
  
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Lower commercial grade.