I agree with the last few posts about it all goes down, and that it will get moved by big storms. I have seen the sand moved and a rock or clay bottom will have lead weights, older coins, and of course gold. When the storm is hard enough, it will scour out the rock and clay bottoms and move everything. I have also seen beaches with rocky (not solid rock like above, but baseball to dinner plate sized rocks) bottom mixed with sand. These will hold the gold too. They are harder to get the rocks up, but worth it. Some areas will have sand with no rock or hardpan, and that is how much of the West coast of Florida is. Or at least a hardpan that is too deep to hit. Remember Florida is a delta formed from the erosion of the Appalachian mountains, so there is no natural rock, it was all sand at one time, just sedimentary rock like sand stone, and coral that formed. Those places the gold most likely goes down and dissapears. If you look at topo maps of lots of shorelines, you can see dunes that are inland, often rows of old dunes going way inland. Much of the panhandle of Florida and lower West Coast has islands like this. So some areas the beaches change by adding sand and going seaward, or eroding away and moving inland and some they dont do much for centuries. You must watch and be aware of erosion and moving of the sand. The sand being moved away could happen at any time. That is the best thing, to find an area of a lot less sand and near a hard bottom. And yes, coins will move a lot, because they have a large surface area to weight ratio. Rings will sink quicker. You can often find copper sheathing from old ships in with shells on the shore, around where old ships have wrecked. You usually wouldnt find heavy pieces with shells. That is why you find pull tabs and aluminum can parts in with shells. The copper is heavy, but when in a thin sheet, acts light. Coins still feel heavy, but catch the water and resist sinking more than a compact ring.