There are four different Pieces of a Broken Amulet, all of which were once part of Koshei's Ancient Amulet.
Piece of a Broken Amulet (Eye);
Piece of a Broken Amulet (Hanger);
Piece of a Broken Amulet (Mouth);
Piece of a Broken Amulet (Nose).
All pieces are part of the Koshei the Deathless Quest.