Stone grinding/sharpening wheel. Dug up dirt find from 1800s Ore Knob Copper Mine, North Carolina. It has some chips.  Exact date is unknown. It has been washed but there may be some dirt remaining with rusty stains. 3 3/8" across, varying width 1" to 1 1/1/8" thick, Interior opening is about 1 1/2". Mine history can be found on most search engines. It will come with a photo packing slip with the relics origin.