What did I make???

I am studying elctrochemical cells in my cl and decided to try something at home. I connected silver to the negative end of a battery and iron to the other. I put it in a solution containg iodized salt (Potium iodide, sodium chloride, calcium silicate, and dextrose) Whatever it is I made it made a dark greenish blue precipitate that floated to the top and then after a while it turned orange because, I'm guessing it was reacting with oxygen. I think i made iron silicate, but I'm 100% not sure. Any ideas on what I could have made???