One of the most fascinating gemstones through antiquity, emerald has been the birthstone for the months of May, June and October. Today, emerald is given as the birthstone for May and has given for luck and as a symbol of wisdom. Some of the most beautiful emeralds found today are found in South America where the Aztecs and Incas used them as a holy gemstone. Cultures that have revered the color green embraced the emerald as a symbol of love for nature or harmony. Today a fine quality emerald can be worth more than diamonds.