My father in law found this in a field wash the other day. It’s heavily oxidized and very heavy for its size, almost like it was made out of lead. It measures 1 5/8” x 1 1/2” x 1/4” thick. I’m stumped as to what it can be.
I’m guessing it’s not lead judging by the pitting and coloring of the patina as well as the pitting pattern from the rust. Still guessing steel from a farm implement. Could be off anything from a planter to a cotton picker. Also looks like fairly recent wear in the second pic unless your friend tried to clean it up with a wire brush