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with a bright green tip
A beautiful blue and green triangle boulder opal
A beautiful pill-shaped boulder opal with bright green and blue colours
A lovely small rainbow boulder with a lighter lilac-tone background
A gorgeous green-blue boulder opal
8.23 Ct wood replacement opal Price_Mid-range with a bright green tipA stunning green, blue and purple 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
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