An oval shaped boulder opal with fiery pinfire colours running down the middle of the stone, like a river.

• 18.70 carats.
• 25.7 x 14.1 mm / 1.01" x 0.55".
• 5 mm / 0.19" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commercial grade.