A small green and blue boulder opal with lovely geometric shape. 

• 6.98 carats.
• 15.2 x 11.8 mm / 0.59" x 0.46".
• 4.4 mm / 0.17" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.