Some of the swimming areas around here have lots of shells; others have gravel mixed with the sand. This makes for interesting target recovery. I'm thinking about cutting up a "noodle" the kiddies use for floatation, and using cable ties, attach that to the frame of one of the sifter boxes I have in my shed. I'll have to attach a line from the floating sifter to my utility strap when I'm in the water. This way, I can scoop, dump it onto the sifter, and spread it out to see the target.
I could have really used that last year, as I almost dumped a ring with a load of gravel. Luckily, I was grabbing small handfuls of gravel out of my scoop, and waving them over the coil. I ended up flipping the ring up and saw the mount. It was a really thin 10K band with a heart-shaped 10K white gold mounting sculpted to look like small stones. The whole thing probably only weighs a gram or so.
The only drawback to using a floating sifter like this, is if the beach is being used by a lot of folks, it's easy for them to see exactly what it is that you're recovering. If they see you picking up jewelry, they might try to claim it for themselves. I'm very careful about that when there's people around, for as soon as I see the target, I drop the basket of my scoop just underwater, reach into it, grab the target out, and then put it into a zippered pocket. I try to do all of them underwater, so nobody can see what it is that I've got.
HH from Allen in MI