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36 Ct wood replacement opal in a classic squarish shape
A lovely striped heart boulder opal
Opal ID 3500 is a dreamy pastel boulder opal
green and caramel boulder opal from our inexpensive range
5.12 Ct wood replacement opal Tucson 36 Ct wood replacement opalA rare and unusual dark 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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