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 ...

Meet the "Virgin Rainbow" – perhaps the finest and certainly the most expensive opal on record. It literally glows in the dark. In fact, as it gets darker around the opal, the opal appears ever ...

The Gold Coast dad has now revealed the incredibly rare and lucrative discovery made inside one of the rocks — which recently ...

Explore the world's most dazzling gemstone destinations, from Myanmar's ruby valleys to Sri Lanka's sapphire-rich lands.

"Mandarin garnet" specimens are the most in demand and the most expensive. Spessartine gem quality stones are rarely larger ...

An extensive and valuable opal collection considered the premier opal collection in the 1980s is up for auction and could be lost for the people of Australia. BRISBANE, QUEENSLAND, AUSTRALIA, June ...

An extensive and valuable opal collection considered the premier opal collection in the 1980s is up for auction and could be lost for the people of Australia. BRISBANE, QUEENSLAND, AUSTRALIA, June ...

An extensive and valuable opal collection considered the premier opal collection in the 1980s is up for auction and could be lost for the people of Australia. BRISBANE, QUEENSLAND, AUSTRALIA, June ...

An extensive and valuable opal collection considered the premier opal collection in the 1980s is up for auction and could be lost for the people of Australia. BRISBANE, QUEENSLAND, AUSTRALIA, June ...