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A stunning green and blue boulder opal with a black body-tone
A lovely small rainbow boulder with a lighter lilac-tone background
A beautiful blue heart boulder opal
08 Ct rainbow boulder opal
A gorgeous green and blue circle boulder opal
6.86 Ct wood replacement opal Tucson A stunning green and blueA beautiful triangle wood replacement opal. What is Wood Replacement opal? Opal formation commences when silica dissolves in water. At our Russells opal mine we have found that this silica solution occupies a void most probably left by decaying tree roots or branches. In cases where the silica infiltrates organic material before complete decomposition occurs, the organic molecules are replaced by silica. This remarkable process results in the
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US$ 744.66
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