I Think it's a Fossil?

[nkellam22]

I found this item 8 inches deep in a metal detecting hole in a park in Luxembourg.
I find tons of Devil's toenail fossils (Gryphaea) in the area which are an extinct oyster species but I've never found anything different.
Like I said I'm more of a metal detecting guy and know next to nothing about fossils and I'm not even sure that this is a fossil, I just don't know what else it could be.
Looking online makes me think it could be a fish scale fossil but that is a pure guess.



Thanks!

 

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[Ninjafossils]

Partial brachiopod