2.13 Ct wood replacement opal Type_Pair Cut in a half-circle shape

Cut in a half-circle shape

43 Ct wood replacement opal in a hexagon shape

79 Ct wood replacement opal in a modern half circle shape

50 x 47 mm

A beautiful round boulder opal with green veins on a dark ironstone face

2.13 Ct wood replacement opal Type_Pair Cut in a half-circle shapeA lovely small 2. 13 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