6.85 Ct 3D Wood Replacement Opal Tucson perfect for a ring or

perfect for a ring or pendant

A small pastel heart boulder opal with light pink

A beautiful blue heart boulder opal

88 Ct wood replacement opal in a classic rectangle shape

50 x 47 mm

6.85 Ct 3D Wood Replacement Opal Tucson perfect for a ring orA stunning 6. 85 Ct wood replacement opal in a classic oval 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 process