Amethyst is one of the most powerful gemstones you can find. It symbolizes peace, and it helps cope with stress by calming your mental state. It is also said to be a stone of protection, most notably protection from addiction. It has strong spiritual properties, and it is said to boost psychic abilities and spiritual awareness, making meditation even more powerful.
It's main chakra is the crown.
The healing properties of Amethyst mostly involve blood and breathing. Amethyst is believed to cleanse the blood while breathing is helped by its calming effects.