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 ...

Over 90% of black opals come from Australia, but they aren't easy to find. Miners start by drilling a vertical shaft in an area they think contains opal. Then they must clear out an underground ...

Mr Stutley and Mr Saunders are mining a patch of land 15 miles north of the South Australian town of Coober Pedy, which is known as "the opal capital of the world". South Australia supplies 80% of ...