Yes, they are here but tough to find. You really have to know your detector. Just went camping with a friend of mine in southwest New Mexico a few weeks back. We were there for two days, detecting all day. I was using a whites vsat and didn't find anything, but I am not very good with a detector at all. My buddy had an older mine lab, a 2200?, and he found 8 pieces for a total of almost 3.5 grams. I have found four or five pieces with my whites down here too, but it was in another spot that's better for Vlf, they were small flakes less than half a gram in weight.