Choose Steel , $12

This necklace comes with a 22 inch matching ball chain.  It can be cut to any length.  Pick releases for use and re-attaches.

Most guitar picks with necklaces are made of pewter, which can't be used to play as they disintegrate quickly.

Brian May from "Queen" who famously uses a Sixpence, which is an English coin, produced a musical with Robert Deniro, "We Will Rock You".

They ordered thousands of these necklaces with the logo of the show, and Mr. May often wore the necklace.