Amethyst was also reputed to control evil thoughts, increase intelligence and render men shrewd in business matters. For travelers, it was worn as a protection from treachery and surprise attacks.
It also kept soldiers from harm and gave them victory over their enemies. It lent assistance to hunters in the capture of wild beasts and fowl. On the other side, it was considered to be a powerful psychic stone of protection against witchcraft and black magic.
Like other royal stones, it protected its wearer from disease and infection.