OPAL YOWAH NUT RAINBOW
An outstanding Opal Yowah Nut Rainbow Gem Stone. A great splash of coloured Opal to show off in your collection. This beauty is split, not polished. The Opal would suit jewellery in pendant or ring form. An outstanding display of a solid Opal with the colours of the rainbow displayed in nearly all angles.
Location:
Queensland, Australia.
Dimensions:
1.5cm x 1.2cm x 0.7cm, 8.5ct.
SiO2 · nH2O
Hydrated Silicon Dioxide.
Opal has been a popular gem for many centuries and has a very interesting structure. The chemistry of Opal is primarily SiO2 and varying amounts of water. The amount of water varies from 5 -10% and greater. This water can help geologists determine the temperature of the host rock at the time the opal formed.