96% of the world’s precious opal comes from isolated areas in the outback of Australia. A small amount of precious opal is found in Brazil and Mexico, the complexity of colour and pattern of these opals is incomparable to that of Australian precious opal. Common opal can be found in a limited number of countries, and is widely found in opal regions but contains no colour. Australian stones can easily be distinguished by their brilliance and play of colour.

The opal fields of Australia are spread around the eastern regions of central Australia, across the states of Queensland, New South Wales and South Australia -

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