Emerald is the birthstone for the month of May and the gemstone representing the 20th, 35th, and the 55th wedding anniversary. Emeralds were once prescribed for eye diseases because the green color was believed to be soothing to the eyes. It was also once recommended as amulets to ward off epilepsy in children. Emeralds were known to strengthen the owner's memory, quicken intelligence, and assist in predicting the future. It is known to be a symbol of rebirth and romance.