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A beautiful and rare bright green crystal / wood replacement boulder opal
At our Russells opal mine we have found that this silica solution occupies a void most probably left by decaying tree roots or branches
40 x 30 mm
Two lovely small rainbow boulder opal pieces
2.01 Ct teardrop wood replacement opal Type_Set A beautiful and rare brightA beautiful 2. 01 Ct wood replacement opal with a pin fire pattern in purple and green colours. 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
