What are the beads on Annabeths necklace I know one is Thalias pine tree but what are the others?

there is thalia's pine, the greek trireme on fire, a centaur in a prom dress, and two other beads that are not mentioned. she also has a trident from the lighting thief, the golden fleece from the sea of monsters, a labyrinth from the battle of labyrinth and the Empire State Building from the last olympian