Auction Fall-Through = Your Gain! - Now More Than 50% Off RRP - 225.6cts - Large Tribal Queensland Boulder Opal from YowahA gorgeous Australian Boulder Opal from the Yowah nut formation that is reminiscent of a birdseye view of a flooded landscape. This stone displays vibrant green and blue colouration contrasting with a gorgeous range of earth tones in tribal patterns unique to the area. Cut to a large freeform shape with a high quality finishing polish. Total weight 225. 6cts approx. Area of Mine Duck Creek, Yowah, Outback Queensland, Australia Dimensions 48. 1mm x 31.