I was out detecting today in an old park, when my detector acted like it just went over a bar of silver, it pegged between copper and silver in the highest tone I have ever heard, so I dug and found this "rock" I thought at first it was lead, so I scraped it with my knife, it's a rock, very very light, about the size of a quarter, looks like a meteorite to me.....but I'm far from an expert.....what do you guys think?...oh, and a magnet willnot stick to it