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Three lovely small dark purple boulder opal pieces
A pretty pastel boulder opal
A fun free-form boulder opal with green
A stunning green-blue boulder opal with a light pink swirl
28 Ct wood replacement opal in a classic squarish shape
6.89 Ct 3D Wood Replacement Opal Type_Carving Three lovely small dark purpleA lovely 6. 89 Ct wood replacement opal in a classic rectangle 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
US$ 29.00
US$ 21.95
US$ 31.90
