Oh, Lord. The stories I could tell...
Well, first. My Jennifer Fisher necklace - I was slowly building it, as all the pieces are ala carte, so I had two charms and my necklace.I took it off at work, and it disappeared. I was beyond heartbroken! I still to this day do not know if a coworker was to blame or someone else, but I searched high and low and never found it.
My second story is about my Van Cleef and Arpels sweet bracelet - I looked down one day and it was gone! I couldn't find it for months and months, then, after a particularly bad lightning and thunder storm, I happened to go out and found it in perfect condition right by my door. I love that little bracelet, and that is why I now have two!