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7.49 Ct 3D Wood replacement opalA lovely 7. 49 Ct wood replacement opal in a classic oval 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

A lovely narrow free-form boulder opal with colourful stripes down one side

A beautiful boulder opal with green

~ 87 carats / 17

and turquoise

79 Ct wood replacement opal in a modern half circle shape

A lovely green and blue striped boulder opal

A beautiful and unique large triangle boulder opal

A beautiful free-form boulder opal with a rainbow colours including broad rolling flashes of yellow

We think the triangle shape would make it a lovely large ring or pendant stone

A lovely blue

49 Ct wood replacement opal in a teardrop shape

perfect for a ring