4.67 Ct wood replacement opal Type_Single A lovely teardrop boulder opal

A lovely teardrop boulder opal with pink

A beautiful 10

A lovely small green and blue stripy boulder opal

A pretty half-circle wood replacement opal with light green and purple colours

4.67 Ct wood replacement opal Type_Single A lovely teardrop boulder opalA lovely 4. 67 Ct purple wood replacement opal with a teardrop shape. 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