3.79 Ct wood replacement opal Tucson not only because it is

not only because it is an opalised fossil

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

A lovely 7

A lovely round purple boulder opal

This beautiful 15

3.79 Ct wood replacement opal Tucson not only because it isA lovely green and purple wood replacement opal. 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 results in the