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 ...

Gemstones have been a topic of fascination ... The red diamond tops the list as the most expensive Diamond in the world that is, valued at a whopping price of up to $1 million per carat.

Tourmaline is unique in the gemstone world for displaying every color of the rainbow, often in a single gem. The most common and least expensive tourmaline gems are black. But as you move up the color ...