i have come upon a 1985 D silver penny it looks exactly like a normal penny but it is silver what is it worth?
It is most likely a cent that someone has removed the copper plating from. In 1982 the US one cent was changed from 95% copper to a copper plated zinc. Zinc is silver in color. Since the mint wasn't even minting silver proofs at that time I think it is quite doubtful this one cent is silver. I'm am not an expert on error coins, this is just my opinion.
I also have a 1985 D penny like this. I'm likely to believe that it is Zinc and it didn't get it's copper coating? What ever the makeup, the coin is silvery all the way through, and when placed in hand with a "normal" coin it sounds funny. Like aluminum. Or Something..... And it doesn't stick to a magnet. I've been asked that question before. I found mine by chance, in a pile of 1943 steel penny's 16 years ago. I have added a picture to my album: Poke's Pictures
Here is a video of the process. By far the most likely reason as thousands are made each year by beginning chemistry students. It shows both gold and silver cent production. http://www.metacafe.com/watch/1262456/make_a_gold_penny/ Jim