8.22 Ct 3D wood replacement opal Tucson if you are after a

if you are after a matching heart set

22 Ct wood replacement opal with a half-circle shape and soft corners

A lovely small teardrop boulder opal from our inexpensive range

10 mm thick

A small bright rainbow boulder opal

8.22 Ct 3D wood replacement opal Tucson if you are after aA lovely 8. 22 Ct wood replacement opal with a half circle shape and soft corners. 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