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A lovely boulder opal specimen from our Yaraka opal mine
Opal formation commences when silica dissolves in water
A beautiful small 3
51 Ct wood replacement heart opal
the wood structure remains visible within the opal
8.24 Ct 3D wood replacement opal Colour_Green A lovely boulder opal specimenA lovely 8. 24 Ct wood replacement opal in a large teardrop 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 process
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