4.86 Ct 3D Wood replacement opal Inner world A beautiful black boulder opal

A beautiful black boulder opal with bright greens and blues

A lovely small boulder opal from our inexpensive range

27 Ct wood replacement opal in a classic squarish shape

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

A beautiful small 3

4.86 Ct 3D Wood replacement opal Inner world A beautiful black boulder opalA 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