Random question - metal detector

I have a couple of metal detectors and a pinpointer and would look for it for you if you were close at hand. Failing that, put an ad in the local shop window and metal detectorists would jump at the chance. Be aware that most garden have a lot of metal in them though newer detectors can discriminate iron out giving more chance of finding non ferrous metals. Unfortunately, a ring pull gives the same signal as a silver ring  though so you may finish up with quite a few holes in your garden unless you can pinpoint exactly where you lost it.