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9.73 Ct 3D wood replacement opalA beautiful purple 9. 73 Ct wood replacement opal in a classic teardrop 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

not only because it is an opalised fossil

with light orange

33 Ct wood replacement opal

A larger boulder opal heart with a thick green-blue opal stripe

A lovely small green and blue stripy boulder opal

A lovely striped heart boulder opal

you receive a 15% discount on them

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

A beautiful light green and blue boulder opal

blue and purple colours

A stunning 6

A gorgeous free-form striped boulder opal