Emerald is a form of the mineral beryl.  A green beryl is called an emerald; a blue or greenish-blue beryl is called an aquamarine.  A red or pink beryl is called morganite.

Emeralds are one of the worlds most sought after gems.  The ancient Egyptians mined emeralds over 4000 years ago. Cleopatra was an avid emerald collector.  The Aztecs and Incas also prized the emerald.  Many ancient peoples believed that emerald could allow the wearer to see into the future. Other ancient peoples believed that an emerald could secure and preserve love between people. It was believed to be a good luck stone.

Emerald is believed by some to promote clear thinking.  Some believe it may help one to sort out difficult problems, and allow one to see things clearly.