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 ...

The Mediterranean Blue” is 10.3-carat fancy vivid blue diamond with VS2 clarity that is the highlight of Sotheby's Geneva ...

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 ...

At Oholei Yosef Yitzchok Lubavitch, learning is never confined to the classroom—it is a living, breathing experience. This ...

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.

in fact the most expensive jewelry in the world. Now we see pearls almost as accessories, relatively inexpensive decorations to accompany more costly gemstones. Before the creation of cultured ...