Also known as a powerful protection stone it is said to create a bubble around the carrier, warding off psychic attacks and negative energy.
It’s a very good healing crystal for people who have, or are recovering from cancer, it’s a wonderful combination of healing and calming.
It is also seen as the sobering stone, very good for any and all forms of addiction, from alcoholism to anorexia, if you suffer with either of these, or love someone who does, a good sized piece of Amethyst under their bed, at the head end will work while they sleep (though it does also have a sobering effect on the libido too so bear that in mind! :)).
Along those lines, it is also said to be a wonderful anti-dote for a hangover or headache, take a smooth stone and rub gently on your temples for a couple of minutes to dissolve the head clouds.
Physically it strengthens the cleansing and eliminating organs as well as the immune system, and is an excellent blood cleanser.