Ick. :’)
The Pacific beaches were either coarse, sharp sand or pebbly; had sand dollars, lots of shells, and mucho agate, many of the mossy variety...and also black sands placer deposits that could be panned by an optimistic teenager.
The Southern beaches around Pass Christian were pretty, but they were the ‘icky’ ones: JUST SAND; almost nothing else. Miles and miles of broad expanses of icky, yucky, hot, prickly sand to get in your shoes and swimsuit.
The Carolina beaches also had lots of sand, but a completely different texture to it that wasn't unpleasant; and were littered with shells, “beach glass”, and interesting rocks.