31.7cts - Tan Tribal Queensland Boulder Opal from Yowah nocert This stone displays vibrant blue

This stone displays vibrant blue and green colouration in a partial crystal centre contrasting with healthy dark ironstone

orange and yellow colouration in striation patterns

A parcel of beautiful Queensland Boulder Opal Rubs from Yowah and Koroit with faces of predominantly blue and green colour in tribal patterns

37g (stones and settings)

A stunning Tribal Australian Boulder Opal from Yowah

31.7cts - Tan Tribal Queensland Boulder Opal from Yowah nocert This stone displays vibrant blueA beautiful Australian Boulder Opal from the Yowah nut formation. This stone displays electric green and blue colouration contrasting with tan earth tones in tribal patterns. Cut to a freeform cabochon with a quality finishing polish. Total weight 31. 7cts approx. Area of Mine Yowah, Outback Queensland, Australia Dimensions 30. 6mm x 21. 2mm x 5. 8mm approx. Formation Yowah nut Shape Freeform Colours blue, green