In my article of artifact in El Dorado, Arkansas, USA I gave a couple of examples of finds of aluminum and other unusual metals in objects that are very, very old. They point to an ancient worldwide civilization that had the abilities of refining ore and manufacturing objects made of these highly unusual metals. These metals are unusual in the sense that they have not been known, or used, in the last 12,000 years, that is, after the Atlantic Period.
Recently, I got contacted by a man from Arkansas who had found a strange aluminum object with his metal detector in the middle of a field. He had it analyzed for its chemical composition. It is very different from the present-day aluminum alloys, containing many elements, even rare earth elements that are rarely or never used in aluminum alloys. The shape of the object is is strange as it is reminiscent of tektites.
I have added his own report to my article, and I wrote a little commentary as to what it might be, at least in my opinion. Go to Artifact in El Dorado, Arkansas, USA.