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4.82 Ct 3D Wood Replacement OpalA lovely 4. 82 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

43 Ct wood replacement opal in a hexagon shape

A fun free-form boulder opal with green

perfect for a ring or pendant

A small and bright blue boulder opal

gold and orange hues

A lovely light green pair of teardrop boulder opals

21 Ct boulder opal is a rare gem that showcases bright pink and green with a black body tone

In cases where the silica infiltrates organic material before complete decomposition occurs

A beautiful small light and dark blue boulder opal

A lovely large lighter blue boulder opal with a light green stripe

A lovely green and blue rectangle boulder opal

Their round shape and swirly patterns remind us of two beautiful planets