Talisman
A talisman was an object believed to hold certain powers.

The Doctor told Freya that the container with one of the photonic lifeforms was a talisman until Unferth interrupted the two. ()

The medicine wheel was a talisman of Chakotay's tribe. ()

A talisman was worn around the neck of the Ilari Autarch. Once belonging to Tieran, it was taken by his overthrowers, though in 2373, he managed to kill the current Autarch and take the talisman back. ()

See also 
 Amulet
 Fetish
Clothing accessories
Religious items