4.86 Ct 3D Wood replacement opal Inner world A beautiful extra small green-blue

A beautiful extra small green-blue boulder opal

A larger boulder opal heart with a thick green-blue opal stripe

We cut it into a circle to give it a a modern edge

27 Ct wood replacement opal in a classic squarish shape

A lovely small boulder opal from our inexpensive range

4.86 Ct 3D Wood replacement opal Inner world A beautiful extra small green-blueA lovely 4. 86 Ct wood replacement opal in a classic rectangle 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