Emerald (Panna) the green colored gem is the gem stone of Gemini, the flirtatious and airy sign of the Zodiac. Mercury is the ruler of Gemini and Virgo and Emerald is directly linked with it. Wearing an Emerald brings good luck, fame and name. Wearing a clean emerald is said to give good results in all the business and trade activities. It will make the wearer a very influential speaker.