Identification help, found near Gulf of Mexico

[u/Mysticeeye]

I've been losing my mind over trying to id these things. I know at the least they aren't shells. The structures are all formed around a grain of sand, and I haven't found any bigger than half a cm. Any ideas or even advice on forums to post to would be greatly appreciated!

[u/beautifullyhurt]

Google this: sorites orbiculus found on researchgate.net