2.51 Ct heart wood replacement opal Type_Single perfect for a ring

perfect for a ring

A very pretty green-blue boulder opal

36 Ct oval boulder opal boasts an impressive array of colours which span the majority of its surface

if you are after a matching heart set

10 mm thick

2.51 Ct heart wood replacement opal Type_Single perfect for a ringA beautiful 2. 51 Ct wood replacement heart 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