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 ...

Discover the extraordinary Gold Sheen Sapphire, a rare gemstone with a striking golden glow. Learn about its discovery, ...

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 ...

As the largest and most prestigious gem exhibition in the world ... Their efforts have not only popularized this rare gem in markets like the U.S. and Japan but have also strengthened its presence in ...

High-quality black opal can cost over $10,000 per carat, making it one of the world's most expensive gemstones. Over 90% of black opals come from Australia, but they aren't easy to find.