Pendant

A pendant is a piece of jewelry often combined with a necklace or an earring.

The Bajoran Kai Opaka gave Miles O'Brien her pendant shortly before she left Deep Space 9 in 2369. She told him that this is for his daughter. 

Harry Kim told Quark on Deep Space 9 in 2371 that one of the lobi crystals he was trying to sell to him would make a great pendant for his mother, Mary Kim.