It is a variety of violet colored quartz. Its name comes from the Greek amethystos, which means free from intoxication.
In ancient Egypt it was used to create jewelry and personal seals.
In the Middle Ages, Christianity adopted amethyst as a symbol of renunciation of earthly goods and chastity, and many cardinals and bishops still wear it today in the form of rings.
Amethyst is the stone of spiritual growth. It protects and repairs the aura, purifying energy at all levels and transforming negative thoughts into positive ones. It also generates harmony and brings a sense of peace.