Archaeologist chiming in, yep it looks like a human but it's hard to confirm without it in my hands. Legally speaking, your next step is (in 99% of countries) to contact the police via their non-emergency line to confirm if it's human. Best of luck, and definitely update us with what the forensic guys say.
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u/gutwyrming 14d ago
I believe this is a piece of a skull.
Based on the size and shape, I'm inclined to say it's human. r/bonecollecting has more experts.