Know all about the Pyrite stuff George, loads of it in the streams and river banks here, we often see folks pottering about mid stream of a mountain brook, particularly during the hot summer months, there scooping up handfuls of gravel, small pebbles and such from around rocks in the stream bed looking for that little nugget. We even had a group of people a few years back, hoovering the stream beds, they had the gall to try and persuade the judge that it was fossicking.