It's only when they are cut and polished that they obtain the brilliance and luster that gives them their value. Historically, gems have been divided into precious and semiprecious classes.

Discover ten rare gemstones that surpass diamonds in value. Learn about these precious stones and what makes them so ...

The rarity of precious gemstones comes down to the geologic process of their formation. Sparkling diamonds and verdant emeralds are some of the most coveted and priciest gemstones. But which ...