Fire opals are translucent and contain shades ... making it one of the most expensive rings in the entire world. Pink diamonds are another form of fancy-color diamonds. Experts disagree about ...

In 2000, jewelry company Le Vian capitalized on ... Black opal costs from $1,000 a carat to tens of thousands of dollars. The most valuable black opal features bright red stone against a very ...

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.