Alternate Names: The Purple Quartz Chakras: Third Eye, Crown Chakra Zodiac: Sagittarius, Aquarius, Pisces Planets: Jupiter, Pluto Elements: Fire Typical Colours: Purple, Violet Amethyst crystals are extremely powerful for protection against all sorts of negative energy, they are exceptional for providing spiritual protection, inner strength and clarity of mind, making them a classic meditation tool. Meditating with them can help you to become more in tune with your feelings, helping you to get to know yourself on a much deeper level. It also stimulates the crown chakra and calms your thoughts.