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5.33 Ct 3D Wood Replacement opalA beautiful 5. 33 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

22 Ct wood replacement opal with a half-circle shape and soft corners

49 Ct small black boulder opal is a wonderful example of mother nature's skill

A small purple wood replacement opal

A unusual pastel pink

Opal formation commences when silica dissolves in water

blue and pink stripes

40 x 30 mm

A beautiful 4

A beautiful and unique large triangle boulder opal

matched in colours but not in size

50 x 47 mm

Their round shape and swirly patterns remind us of two beautiful planets