The Emerald is one of the rarest and most valuable of gemstones. The emerald is the most valuable variety of the mineral beryl. Emeralds can be found throughout the world. They have been collected in Colombia, Brazil, Russia, and the United States.
The value of an Emerald is based upon the 4 Cs. These are the Clarity, Color, Cut, and Carat Weight of the gemstone.
Emeralds can be crafted into beautiful pieces of jewelry like this extraordinary 37-carat emerald ring which is displayed in the National Museum of Natural History.