For more information about boulder opals please click on the picture guide mentioned above but basically boulder opals are another kind of black opal. The difference being that the ‘mother’ of this type of opal is chocolate-colored ironstone found often in large boulders in the Winton, Quilpie, Yowah, Koroit areas of western Queensland.
These amazing stones are very secure and reliable and of course, this ring comes with an international perpetual guarantee.
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