So I dug out my old one and put it back on and promptly lost it. Twice. The first time, I just happened to backtrack and see it on the ground. I didn't even know it was missing until then! Then I lost it for good. :(
Not everything is a loss though, because now I have a new turtle charm! (The lost one looked like a piece of candy.) I don't think I will be losing this one any time soon!