I found this circular item last week along with a 3 ringer, Gardner and a round ball, it measure about 1" in circumference and has what appears to be leaves on the outer ring and dots on the inner ring with rays coming to the center with what looks like a flower petal of sometime.
That what I thought when I first dug it up, I forgot to mention it has a small hole at the top and one almost in the middle. As you can see from the back it is hollow with no shank. I am still new to this picture taken with a digital camera.