When you think of expensive gemstones, what comes to mind? Most people think of the Big Four: diamonds, emeralds, rubies and sapphires. However, it might surprise you to know that there are ...

Throughout history, gemstones have been symbols of opulence, power, and mystery. Among the countless gems found in nature, a select few stand out not only for their beauty but also for their ...

Green gemstones are believed to symbolize harmony and healing — only part of the reason they’re so expensive. Green reminds people of nature, so it’s only natural that green gemstones are believed to ...

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. After investing tens of thousands of ...