"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Opals may have been around for thousands of years, but they’re having a major resurgence in the ...

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.

Located in Clearwater Beach, Florida, about halfway between St. Petersburg and Tampa, Opal Sands Resort provides panoramic views of the Gulf of Mexico. Recent visitors praised the spacious rooms ...