A rectangle boulder opal with green-blues and purples.

• 17.86 carats.
• 24.8 x 14.7 mm / 0.97 x 0.57".
• 4.6 mm / 0.18" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.
• Opal ID 2875.