https://www.liveauctioneers.com/price-result/1418ct-blue-boulder-opal-australian-opal-76e/
14.18ct Blue Boulder Opal Australian Opal , 76e
Ksmith Heritage Auctioneers Subject: Natural Boulder Opal Origin: Australia Carat Weight: 14.18Ct Dimension: 18.8x14.2x
blue boulder opal1418ctaustralian