Emerald (Panna) is gemstone for Mercury. Mercury is the smallest, high energised and powerful planet among all planets in solar system, known to provide fast financial gains. People of Gemini (Mithuna Rashi) zodiac sign and Virgo (Kanya Rashi) canpurchase Emeraldto get maximum success. . Also, if you want to be successful during Mercury period, you can wear this gemstone. The main source of Emerald is Zambian and Colombian mines.