Old looking button sized object

[Bramblefind]

My brother found this in his yard. His house dates back to the 1700s. I offered to try to find out what it is and snapped a few pictures. He has the item so this is all I have. The picture of the back did not come out that well but it has a notch on the edge. It is solid & heavy for it's size.

Thank you!

 

[Breezie]

Hey Bramble, it looks like some type of mold; maybe a snap button mold? I lighten the darker pic for you. Interesting find, Breezie

 

[Bramblefind]

Thank you Breezie! Definitely some similarities with what you posted - great thinking!

I will see if what I can find using that lead.