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A large and stunning rainbow heart boulder opal with a purple-hue
A lovely blue swirly boulder opal heart
46 Ct purple wood replacement opal with a teardrop shape
A lovely small boulder opal from our inexpensive range
35 Ct wood replacement opal in a free-form shape
3.31 Ct carved flower opal Colour_orange A large and stunning rainbowA beautiful small 3. 31 Ct flower carving from 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
US$ 24.00
US$ 54.90
US$ 107.78
