A large geometric boulder opal with green-blues and a wonderful purple stripe that runs down the middle.

• 49.73 carats.
• 57.9 x 16.2 mm / 2.27 x 0.63".
• 6.2 mm / 0.24" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Gem grade.
• Opal ID 3139.