I've tried to identify the shells online without much luck. I tried descriptives like "corkscrew" and "unicorn" (which, oddly, brought up even more images!) and I suspect these are the "innards" of some spiral shell. But I'm totally stuck.

Anyone know what these are? I'd like to get a ballpark figure of their value. I think I spent more than I wanted to, sure I would find a use for them, but so far, nada. :-(

Thanks!