france1 i know people does not like doing tests,but i have found that gold,silver are whatever you are hunting has got 12 image's are you might call them rings,(very strong) if you check your rocks that you dig out the hole and your rod's pull to it,then put them to the side about 20 feet away,wait about 20 minutes then check them again,if the signal is gone, you do have a real target in the area,you are on a ring,of a real target.................if the rocks still has a strong pull, walk away nothing there........the 12 rings i have found are the depth rings 4 n,s,e,w if it gold,when you walk off the target spot,(with L-rod) when you get to 18 feet the rods will swing side ways,this is witness rings there be 4 of them,and if it's has been in the ground a long time, the power ring can be several hundred's yards out,be 4 of them......i have learn all this the hard way by digging holes, but each hole i would get what was causing the signal, and a sample of it,where i could test and get rid of that signal,where it would not happen again.....do testing and use the rods every day,and you find your rainbow,like i have. good luck