6.49 Ct Wood replacement opal Tucson A stunning purple 2

A stunning purple 2

A fun free-form boulder opal with green

black body tone

A wonderful rainbow boulder opal with an unusual darker lilac body tone

A beautiful round boulder opal with green veins on a dark ironstone face

6.49 Ct Wood replacement opal Tucson A stunning purple 2A lovely 6. 49 Ct wood replacement opal in 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 process