Following is a transcript of the video. Narrator: High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. But mining black opal isn't easy.

Opal-mining is one of the world’s most harrowing pursuits, but potentially one of the most rewarding as well. To find opals, a modern treasure hunter must dig random holes in areas of known deposits, ...

The Adelaide Fringe has spread its wings to an Outback town where patrons can go mining for gems under the stars with a TV personality. He’s the son of an opal miner from the Outback town, has mined ...

Opal miners in the outback have long been considered just beyond the edge of "normal" society — remote and slightly secretive, with their own traditions and superstitions. But two young miners in ...