Please take a look at these

[Denise23]

Do you have any idea what those rocks might be? I found them by the seashore in the Netherlands.

 

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[Kray Gelder]

Welcome, Denise. They both look like flint.

 

[vpnavy]

Do you have any idea...

I noticed this was your very first post - so, Welcome Aboard Denise23! You didn't list your state (or country) in your profile. So, you might consider jumping over to Sub-Forums: Select Your Area.... and selecting location information (i.e., clubs, hunts, finds, legends, maps, etc.) directly related to your state (or country).