Amethyst is revered by many for its calming properties. The stone is thought to help those battling emotions such as grief, loss, and sorrow. Many use Amethyst to cleanse negative energy and encourage tranquility. The purple energy of the gemstone is associated with the crown chakra, which is thought to be the center of spirituality and consciousness. Amethyst is the most popular variety of quartz. The stone is violet in color and appears somewhat transparent.