3.15 Ct 3D Wood Replacement opal Type_Pipe A lovely blue opal heart

A lovely blue opal heart with a patch of pink

A beautiful blue and green triangle boulder opal

51 Ct wood replacement heart opal

blue and grey boulder opal specimen

3.15 Ct 3D Wood Replacement opal Type_Pipe A lovely blue opal heartA lovely 3. 15 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 meticulous