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A lovely small green and blue stripy boulder opal
A lovely boulder opal from our inexpensive range
A one-of-a-kind heart boulder opal heart with white stripes
A lovely small hexagon boulder opal
29 Ct boulder opal is an impressive gem that showcases blues
4.70 Ct 3D Wood Replacement opal Type_Single A lovely small green andA beautiful 4. 70 Ct 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
US$ 150.00
US$ 29.50
US$ 180.00
