But over 90% of the world's opal comes from Australia. And a lot of the black opal is found here, at Lightning Ridge. It's located on the edge of the Outback, with a population of just over 2,000 ...
On the table between them lays a small black ... Lightning Ridge.(Supplied: Bob Smith) "Two natural phenomena that are stupidly unlikely — the formation of a fossil and the formation of opal ...
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