The emerald is May’s birthstone most likely because of its green color evoking the freshness of spring and growth. It symbolizes vitality, fertility and abundance.
Many ancient ruler have been enchanted by the emerald from Cleopatra to the Incan Emperors.
In ancient times it was rumored that staring into an emerald will restore clarity to your sight. It was believed the color green relaxed the eyes. Science can back this up, green does relieve eyestrain.