3.53 Ct 3D Wood Replacement opal Mine_Yaraka A small and bright blue

A small and bright blue boulder opal

black body tone

28 Ct wood replacement opal in a classic rectangle shape

51 Ct wood replacement heart opal

~ 87 carats / 17

3.53 Ct 3D Wood Replacement opal Mine_Yaraka A small and bright blueA lovely 3. 53 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 meticulous