Emerald Gemstone (Panna Stone) is considered most precious gemstone. Source of Emerald stone is Colombia and Zambia, Brazil, South Africa, Zimbabwe, Russia, and Afghanistan. As per Vedic Astrology, the properties of the Panna stone are associated with the planet Mercury (Buddh). Emerald gemstone is associated with zodiac signs Gemini and Virgo. Emerald gemstone helps in increasing concentration. Helps Sportsmen and creative people like writers, painters, and sculptors.