It's very easy to find jewelry, go to where it's lost. Yes, I am related to Half, Dumm and Jack, I'm Smart-A..
The larger point is what type of jewelry? Silver and copper for sure with all "junk" disc'ed out. Gold most often falls below a LOT of canslaw/pull tab target categories. Old buttons, pins, hair pieces often come in just below that zinc cent area as well.
So where are the "easiest" places to find jewelry despite the presence of junk. Any mediums that are easy to work through; sand, pebbles, wood chips and the like. Because being that much easier to recover makes pulling junk that much less of a task.
And once cleared of all the pre-hunt junk, your sites will be easier to hunt as those targets are replenished seasonally. If they are not already hunted by others.
Have fun and let us know how shiny those first big finds are!