Here is your answer.
Roughly 95% calcium carbonate, though.
Welcome to the collective. :)
And more importantly, what the hell is a dickens?
I lurve Dickens.
@AstroChuck. A Dickens is a literary genius responsible for treasures such as Great Expectations, A Tale of Two Cities, and David Copperfield, just to name a few. :o)
Yeah, but what does Charles Dickens have to do with eggshells?
@AstroChuck. I’m working on that. Let me get back to you.
Thinking Dickens needs a punch in the… well, you know ;)
Dick-ens are male chickens, duh!
@Baloo72 Lovely way of answering a google-able question with full respect. Lurve to you!