A small ironstone boulder opal specimen with a rainbow opal vein.

• 170 carats / 34 grams
• 68 x 20.4  mm / 2.67" x 0.80".
• 13.8 mm / 0.54" thick.
• Natural solid boulder opal specimen.
• Mined by Sue at her Yaraka opal mine in Queensland, Australia.
• Sits on its base in two directions.