2.01 Ct teardrop wood replacement opal Type_Set A lovely extra small marquise

A lovely extra small marquise shaped boulder opal

Two lovely small rainbow boulder opal pieces

bright green-blue boulder opal

purple and green colours in direct sunlight

At our Russells opal mine we have found that this silica solution occupies a void most probably left by decaying tree roots or branches

2.01 Ct teardrop wood replacement opal Type_Set A lovely extra small marquiseA beautiful 2. 01 Ct wood replacement opal with a pin fire pattern in purple and green colours. 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