A rectangle matrix boulder opal with multiple colours.

• 17.07 carats.
• 26.8 x 13.3 mm / 1.05 x 0.52".
• 4.2 mm / 0.16" thick.
• Natural solid boulder opal.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Commerical grade.
  
• Opal ID 2920.