A set of three extra small boulder opals with greens and caramels. 

• 2.92 carats (total).
• Left,  6.4 x 5.5 mm / 0.25" x 0.21".
• 2.4 mm / 0.09" thick.
• Middle, 10.2 x 5.5 mm / 0.40" x 0.21".
•  2.1 mm / 0.08" thick.
• Right, 10 x 8.8 mm / 0.39" x 0.34".
•  2.5 mm / 0.09" thick.
• Natural solid boulder opals.
  
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.