A four-leafed clover is felt to be especially lucky. This Irish charm is very old, although it was later Christianized. Clover is a symbol of life, luck and abundance. Actually, toadstone is a fossilized shark's tooth. It is believed to heal illnesses and to repel evil.
Salt is considered to be a hallowing substance that purifies, repels evil, and attracts wealth.
In Roman times, salt was considered a substitute for money. Salt is used to banish evil. Catholic baptism employs it for purification. Some believe that it will repel demons. According to legend, silver is a holy metal which can injure evil.