Panna Stone  Certified 9.5 Ratti Cultured Certified Loose Precious Emerald Gemstone Panna is the birthstone for Virgo (Kanya) sunsign (23 Aug-23 Sep) and is the for Gemini (Mithuna). Ascendants of Taurus, Libra, Capricorn and Aquarius can also wear the Emerald gemstone. Emerald strengthens Mercury (Buddh) which showers upon its wearer Wit, Creativity, Art, Prosperity, Wealth, Health, Agility and a very Sharp Mind.