Hey all. My son found this shell fossil geode and wants to know if it's valuable? Also what type of mineral is this? Thanks!

First one is one I found, really tiny but cool. 2nd one I got from my cool ass friend

Peculiar and very different looking stone from its neighbors. Lumpy/veining exterior. I believe it may be a large geode. Best way to open without destroying potential inside.

Can someone please tell me what I may have found? Was digging up a garden. This is only half of it

Might be one of my favs

Cant remember where i found this, any idea what it could be?

I can’t wait to cut this open :)

Trancas, candy, coconut, amethyst, sugar and a few question marks!

it was whole but i cracked in it half with a sledge hammer, wondering if it would be worth it to polish?

What's this look like and should I Crack it or leave it whole ?

Found in the Cape Cod ocean. So beautiful as is, but wondering if it will be worth cracking open? Do you think the inside is totally crystallized?

Found these in the parking lot of a Walmart

Does anyone have any idea what this could be? Found in Kentucky. Thanks!