A set of two small green and matrix boulder opals.

• 6.76 carats (total).
• Left, 16.9 x 5.2 mm / 0.66" x 0.20".
• 2.9 mm / 0.11" thick.
• Right, 20.3 x 7.2 mm / 0.79" x 0.28".
• 3.0 mm / 0.11" thick.
• Natural solid boulder opals.
  
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.