Amethyst is a violet tint of quartz crystal. It gets its color manganese, iron and titanium. It is found in South Africa, Brazil, Canada, India, Madagascar, the Urals and Uruguay.
The virtues of the amethyst are soothing and purifying. It eliminates stress, calm insomnia and promotes concentration and meditation. This is a very beneficial stone for the mind, which makes finding the balance and serenity. Leonardo also wrote about her that she had the power to "dispel evil thoughts and sharpen the intellect."