> Egg shells are more organic than you expect.

I expect them to be completely organic. What else would they be?

namespace collision: to the layperson, it's organic because it came from an organism. from a chemical perspective, it's considered non-organic

i admit i read ops comment and was confused for a second until it clicked. they're mostly calcium carbonate

I wondered about that but then in context wasn’t sure of the relevance. I’m aware that even fresh eggs are somewhat porous and wouldn’t expect the contents to last beyond a week before beginning to break down.

Mostly calcium carbonate.

Calcium carbonate. So a salt I guess?

So eggs shells are less organic than I would think.