A rectangle boulder opal specimen with a lovely green-blue opal among with caramel potch and ironstone.  

• 53.14 carats / 10.62 grams
• 25.4 x 21.9 mm / 1.00" x 0.86".
• 10 mm / 0.39" thick.
• Natural solid boulder opal specimen.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Stands on its own in three of four directions.