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.

The two men are standing in the middle of the sun-bleached South Australian outback, hunting for opals, the rare gemstones that ... they did at least have some recent luck, when in March they ...

Tucked beneath the back of the stairs at the Ramada by Wyndham Tucson, 777 W. Cushing Street, Eritrean-born Huruy Zerzghi ...