Jade doughnut from the backyard

I mentioned that I found a jade doughnut in the garden in a previous post. I finally found it and snapped off a picture. What do you think? Ancient, rare artifact? Or kids pendent lost to play and adventure in the yard? It could even be a relic of the generations of pack rats that lived back there. Who knows, but it is fun finding little things like this. They make my mind wander about the past, and history of a place.