Ever since ancient times, emerald, which is also known as Panna ratan, has been regarded as a highly effective astrological gem in Vedic astrology. If you talk about classical Hindu literature, it says that emerald gemstone represents the small yet powerful planet Mercury (which is known as Budh in Hindi). Budh is said to bear a strong influence over the native’s life. Since emerald is associated with the planet Budh, it is sometimes denoted as Budh Ratna. Primarily, emerald is worn by the natives to strengthen the weakly placed Mercury (or Budh) in the horoscope and gain positive influences of Mercury in life.
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