Emerald is the birthstone for the month of May, and the gem for the 20th and 35th wedding anniversaries. Cleopatra was known for her passion for Emeralds. This gemstone is a variery of the mineral Beryl and is colored green due to trace amounts of chromoum or vanadium. Its is regarded as a royal crown jewel. Apart from Diamonds, it is one of the most scarce and valuable gemstone. They come in a variery of green colors with unique natural inclusions.