Well, this thread is all over the place, hahahaha!
Check out this rather small and blah looking piece of shell. If you saw just the shell on a site and you didn't recognize the tool and/or the work on it, you'd have walked right over this piece.
Link is to Key Marco collection pics of some perishable stuff and other stuff found in a wet site. Recognizing tools and pieces of them and recognizing work/wear is paramount, yes paramount LOL, when finding and collecting shell tools. Gatorboy those stones are definitely weights. Many times they didn't even have to drill them because they had fossilized wormholes/critterholes in them and they used them as they were, and you see just a little wear if at all where the cordage rubbed. Around here they like Pleistocene stone that had holes in it and they are usually flat and hand sized. "If it was holed, they used it" boom. GB, haven't you found worn/abraded clamshell bits on sites? I've found an awful lot and I'm not talking about shell food debitage/refuse. I find them abraded in all stages until they are a ground up nub or piece.
I believe they used shell powder for some kind of eating, paint, tempering pottery or who knows what, and used a lot of it. But these pieces are found in the middens and on top of them, not just eroding out and rolled around in the surf.
Don't have pics of these yet.
Calcium, chalk...Jeez don't tell me they had bad heartburn!!! Ya know , one of the most common bottles found in dumps is for hearburn/dyspepsia......and is still one of the most common human health problems (if you aint eatin' right@!!@@@).
Key Marco Collection Image Gallery | South Florida Archaeology & Ethnography | Florida Museum
Wonder what this shell piece is from a similar site, not rolled around in the water or surf, found atop a midden

?.....!