I found a tiny 14k gold necklace in my wife's jewelry box and did some testing with it. I went out in the yard and threw the necklace on the ground in a metal free spot and started swinging. I wasn't surprised that my Tesoro Compadre with its 5.75 inch coil would sound off on it, because it's well known for finding tiny gold jewelry. With the discrimination set just above 'iron', the Compadre was getting a little over 3 inches with a good audio response. I got no audio response with either the Outlaw or the Bandido II