Periodic Table Nerdy Necklace
 
This super scientific silver bar necklace features an adjustable chain and a necklace that features a collective periodic chart carding and an elemental bar necklace that includes the three elements N (Nitrogen), Er (Erbium), Dy (Dysprosium). 

Dimensions: Pendant 1.45” L, .3” H; Necklace 18.6” L (Approx.)