I posted this in the Friends and Finds section hoping more eyes would help, no such luck. I did some google searching on battery components and I'm leaning towards a positive battery plate. I couldn't find something with the same exact raised square pattern as this one, but the white and green powder I found surrounding it when I dug it up is unmistakable from some sort of battery or electric corrosion. Found these two links
Link 1
Link 2
Link 2 I went through all 16 chapters, interesting stuff! I never did see anything that is as thick as the piece I found, ahh well.
From link 1 "The positive battery plates are made from an alloy of low antimony, selenium and arsenic, with silver added for extra corrosion resistance." So, bad, dietary suppliment, very very bad, and well silver is nice, except for the rest of the stuff killing me deal. I'll go bring this to the dump to be disposed of properly.
Moral of the story, be wary what you dig!
Jai
p.s. I could be totally wrong, though it isn't too far fetched after looking at the "DIY" book from link 2. If someone has anything else it could be let me know. I suppose a lead alloy wouldn't be heavy feeling like true lead. Everytime I scan it, it always comes up 00 27