Emerald is a popular, beautiful gem with its most desired colors ranging from bluish green to a pure saturated green. Historically, the gem was used to remove weariness and restore eyes by simply looking at it. Today, this phenomena is still recognized, as the color is known to relieve eye strain and stress. Legends also has that emerald wearers had the ability to foresee future events, fight disease, and were protected against evil spirits. Today, most significantly, the gem reflects spring growth. Emerald is the birthstone for May and the gem for the 20th anniversary.