I was using a whites Spectrum when I found it. It was found at the edge of a field by a tree where that sloped down toward a creek. It was near the site of a 1900's college. The college did burn down. I thought it might be melted clad coins at first. I have only seen one small piece of copper it it so far. Since the college burnt in the early 1900's, coins where silver, gold or copper, no nickle. All I remember was in was high up in the coin range. It reads 00 26 on my Explorer II. It is not lead, silver, or tin. There is one spot where I have found a small piece of copper. The green is corrosion that is forming since I dug it up. I think it's nickle because it is turning green like some nickles I have found. It also does not rust. Since I know it's not a meteorite I have beat on it slightly with a hammer. It does not dent except on the corners but it knocks the green corrosion loose. I have also polished part of it with a dremel tool and it shines like silver. If it was silver I could scratch it with a knife. I can flatten a corner with a hammer but it flakes off afterwards. Unless heating silver to a high temp makes it hard and brittle then silver is out. Next, I may cut a piece off to get a look inside.