Emerald (Panna)
Emerald (Panna) is the gem of Mercury in Vedic astrology. Traditionally set in gold and worn on the little finger on a Wednesday, it is linked with clear communication, learning and business sense.
Also known as: Marakata
Mercury stands for intellect, speech, learning, trade and adaptability. An emerald is worn to strengthen a helpful Mercury that is weak in the chart, for example combust or poorly placed.
By house lordship it is most often considered for Taurus, Gemini, Virgo, Libra, Capricorn and Aquarius ascendants. Astrologers are usually wary of it for Aries, Cancer, Leo and Scorpio ascendants, where Mercury rules one of the 3rd, 6th, 8th, 11th and 12th houses, and careful with it for Sagittarius and Pisces, where Mercury rules the 7th, a maraka house.
Emeralds often contain natural inclusions and are commonly oiled, so ask about treatment and buy with a lab certificate. They are delicate, so remove them for heavy work. Peridot and green tourmaline are the usual substitutes.
An emerald supports effort; it does not guarantee results. Check your whole chart with a qualified astrologer first.