Amethyst is a purple-colored gemstone which is called Jamunia in Hindi. This is the substitute for Blue Sapphire stone or Neelam gem. In order to strengthen the position of Shani in the birth chart and attain auspicious results from it, Jamunia is worn. As per Vedic Astrology, natives of Capricorn and Aquarius, along with Gemini, Virgo and Taurus, zodiacs are suggested to wear Jamunia. However, it is necessary to consult with a learned astrologer.