✅ SOLVED Sandstone and other rock? Any ideas?

[Ace 350]

I’m guessing the sandstone (bigger rock) was possibly used for sharpening and the other rock I have no clue on. Any ideas on these? Thanks for looking.

 

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[Kray Gelder]

Just eye-balling your first specimen, I think it's naturally formed. Your second looks like a chunk of a chert nodule.

 

[TheCannonballGuy]

Krey Gelder is right... the second rock (light-brown outside, medium-to-dark grey center) is a broken-open chert/flint nodule. Flint is a variety of chert. I hope the link below works, and if not, do a google-search for flint (or chert) nodule.

flint nodule - Bing

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