Australian Boulder Opal Cabochon 22.9ct

Australian Boulder Opal Cabochon 22.9ctFrom Queensland, Australia, Boulder Opals are a unique interplay of ironstone, less commonly in wood, water, silica, rock and millions of years old This example showcases that combination beautifully with the most desirable colour of boulder opal which is pink and it also has blues, yellow and green. It really is a beautiful piece. The stone tapers down in height from the top to the bottom. Dimensions at widest points: 4. 3cm x 1. cm x 0. 5cm

amber is well-known for it's golden and orange hues

This piece is rich with details and dendrites that look like rolling hills and trees

This band of light moves side to side across the stone as the stone is moved in the light

Weight: 13

either by pressure filling the porous stone with a stabilising filler or by grinding down the turquoise into a powder and then mixed with epoxy to reconstitute it

It also has a beautiful background colour

that can only serve to emphasize the streamer pattern in a cabochon

or Firoza locally

The silica that was contained in the volcanic ash would have dissolved in the water and as it travelled down into the ground where the trees were buried it filled or replaced the cell walls and then crystalised

Weight: 7g

Dimensions at widest point: 3

Sagenite is a very rare and unique gemstone and this one contains dense mineral growths