This amazing and authentic natural Colombian emerald gem, it is a precious stone perfect to set in a ring, pendant, or any custom jewelry. The Colombian EMERALD has long enjoyed being one of the most beautiful, costly, and rarest gems known to mankind. The Birthstone for May is Emerald. Being one of the 3 Precious Gemstones, besides Ruby and Sapphire, Emerald is one of the most Prevalent Gems in the world.