Cut 1/4 Piece of Coin ID Help

[BrianNY]

Found this today on Eastern Long Island. Don't know it is corrosion but it looks like a branch and possibly remnants of berries. I know it's not much to go off of but any ideas??

 

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[jewelerguy]

got a pic of the other side? if it's copper, I'd lean towards it being a Spanish 8 Maravedis https://www.ngccoin.com/price-guide...is-km-461-1811-1817-cuid-1081871-duid-1514800

 

[Mackaydon]

If silver, it may be 1/4th of a 4 reales coin (of about 32mm in dia.)
Don...