BLACK OPAL LIGHTNING RIDGE
An outstanding Black Opal Lightning Ridge for a spectacular piece of jewellery or as an investment. Black Opal is Rare and hard to come by. Rivals Crystal Opal and is preferred by some people. The stunning Opal displays a spectrum of Blue Green colour. This large specimen weighs in at 10.81ct carats. A large gemstone ready for the most beautiful pendant. This Genuine Natural Australian Black Solid Opal is a truly worthwhile investment.
Location:
Lightning Ridge, New South Wales, Australia.
Dimensions:
2.55cm x 1.6cm x 0.5cm, 10.81ct.
Opal: SiO2.
nH2O Hydrated Silicon Dioxide.
Opal has been a popular gem for many centuries and has a very interesting structure. The name opal comes from the Sanskrit name for precious stone upala. Opal structure is not crystalline and considered a mineraloid. 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.