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blue and purple colours
A gorgeous rainbow pair of boulder opals
A stunning green-blue boulder opal with a light pink swirl
A classic oval boulder opal with a gorgeous pink and green fine-stripe pattern
A fun free-form boulder opal with green
6.89 Ct 3D Wood Replacement Opal Type_Carving blue and purple coloursA lovely 6. 89 Ct wood replacement opal in a classic rectangle shape. 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
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US$ 93.50
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US$ 37500.00
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