Hi here's a cpl more picts of the heavy pieces I'm finding, these are as heavy as lead, vary in size and shape, the 1st pict is what they look like when I find them, the 2nd pict is a group of them the 3rd is one I cut in half, these are non magnetic but are ever so slightly attracted to a magnet all have a black/brown burn on the outside of them, whatever it is it is it's quite soft. if there is anything I can do to help in identifying them (close up picts. etc. please let me know. thanx.