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A beautiful round boulder opal with green veins on a dark ironstone face
Its vibrant hue and exceptional clarity make it a unique and beautiful gemstone
not only because it is an opalised fossil
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What is Wood Replacement opal
3.79 Ct wood replacement opal Tucson A beautiful round boulder opalA lovely green 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 the
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