4.28 Ct 3D Wood replacement opal Type_Carving A beautiful small 3

A beautiful small 3

A small pastel heart boulder opal with light pink

We don't get these very often

A beautiful light green and blue boulder opal

A lovely small teardrop boulder opal with rainbow stripes

4.28 Ct 3D Wood replacement opal Type_Carving A beautiful small 3A lovely 4. 28 Ct wood replacement opal in a classic squarish 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 remarkable