Talisman
from the Antique Jewelry University
A talisman is a charm, amulet or other ornament that has a magical meaning to the wearer. It could ward off evil, desease or warrent good luck to the wearer. Often special attributes were assigned to gemstones and different stones were believed to protect only in certain months, related to the zodiac signs. Birthstones are derived from this common practise in medieval times, although the use of talismans is from all ages.