21.4 ct Aqua Blue Queensland Boulder Opal With Striking Pattern And Depth, Twin UN-0158

This 21.4 CT Queensland boulder opal cabochon reveals intense aqua blue and green play-of-color that moves fluidly across its natural ironstone host, creating a striking “rockpool” pattern unique to the stone. Featuring a natural twin (Item UN-158), this opal presents a rare opportunity for matched-pair designs or complementary creations while maintaining premium collector and custom jewelry appeal.