I was able to get out this past Sunday for a short hunt. When I get to the school yard I then realize I forgot my adaptor for my headset. So instead of driving home to get it, I decided to use the on board speaker and give it a try. On my first past down the side of the building I got this loud high tone and thought it to be a quarter and out came this beauty. I don`t know stones very well but I think it could be a pearl.