I was hunting a area where a small town used to be along with a old Silver Smelter, I bent down and looked at some of the odd rocks and they where very heavy for their size so out of curiosity i put my coil over a few of the rocks and had a flat signal from the rocks but no VDI came up, i got the coil right on it and it freaked out saying Lift coil/ turn gain down.......i switched to prospecting mode and it wouldnt give me and sign of what it might be but it did make the same noise as in relic mode.
What experts know what this is called? and what might the rocks contain to send it off?
What experts know what this is called? and what might the rocks contain to send it off?