Though an amulet is not often worn today, they are representative of ancient Egyptian jewelry. This piece is circa 254 BCE and is gold adorned with lapis lazuli, turquoise, carnelian.

“An amulet is an object, usually worn, that is considered to have powers that will protect the person. In many cases, the amulet is the same as a talisman; but a talisman may be carried, where an amulet is usually worn. Both the amulet and the talisman are considered to be protection against some form of evil and are common to numerous cultures ancient and present. However, faith in the amulet or talisman was often greater for many in past times, when more folkloric beliefs were accepted.

In Ancient Egypt the amulet might depict gods, hieroglyphics or certain revered animals, carved out of precious stones. These amulets were generally worn during life. After death the amulet was still worn as protection in the afterlife.”
from Wikipedia