365 Ct blue patch boulder opal specimen

An interesting boulder opal specimen that is covered in patches and veins of lighter blue, milky opal.  

• ~ 365 carats / 73 grams
• 54.8 x 44.3 mm / 2.15" x 1.74".
• 19.2 mm / 0.75" thick.
• Natural solid boulder opal specimen.
• Mined by Sue at her Mt Margaret opal mine in Queensland, Australia.
• Stands on its own in one directions (pictured below).