Happy Birthday May Babies!! Emerald is the birthstone for May. The name Emerald is derived from the French "esmeraude” and the Greek root "smaragdos” which means 'green gemstone'. Top quality emeralds are a deep grass green with a slightly bluish cast, but many lesser quality stones are lighter shades of green and can have a more yellowish tone. Emeralds are found in many countries, but Columbia and Brazil are the major producers and Columbia is recognized as the source for the finest stones. Folklore suggests that these stones will improve memory, intelligence, and enhance clairvoyance thus helping to predict future events. They are also worn to enhance love and contentment.