Amethyst is a violet variety of quartz and one of the most popular gemstones in the world. It is the crown chakra known as our connection to the universe, as well as the third eye or Ajna chakra. A very powerful gemstone, amethyst conducts energies of calm and healing while removing negative energies.  Amethyst is also recognized as a stone associated with the Zodiac signs of Aries, Pisces, Sagittarius, and Scorpio.