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8.43 Ct wood replacement opalA lovely 8. 43 Ct wood replacement opal in a hexagon 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 process results

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

Opal ID 3500 is a dreamy pastel boulder opal

A beautiful pink

A lovely 5

A lovely small green and blue stripy boulder opal

32 Ct wood replacement heart opal

A pretty half-circle wood replacement opal with light green and purple colours

A lovely 12

A beautiful 4

A beautiful rainbow striped boulder opal

A lovely large blue triangle boulder opal

88 Ct wood replacement opal in a classic rectangle shape