The biggest, most expensive gemstones have always been popular throughout ... already cut in a pear shape, in India in order to sell it to the English King George I. He finally sold the gem ...

The most valuable emeralds are typically those ... How do I find the value of my gemstones? In order to get the most money, you must understand how gemstones are graded, which gives you an idea ...

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 ...