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79 Ct wood replacement opal in a modern half circle shape
Cut in a half-circle shape
A beautiful round boulder opal with green veins on a dark ironstone face
green and blue boulder opal
A beautiful
2.13 Ct wood replacement opal Type_Pair 79 Ct wood replacement opalA lovely small 2. 13 Ct 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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