Hi everyone, We been digging 45 feet back inside a cave tracking down a metal object and the clay inside up until now was brown. Now that we are close to the metal object there is a 2 foot streek of gray clay from the top of cave to the floor. When we dig the gray clay we see greenish blue powder or something inside of it. I sent samples out to a lab and no one knows for sure what turned the clay gray. The greenish blue looks like the same color on old copper. We are tracking down gold so I…