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Originally Posted by matthew88 I don't think it is rust, but I have never seen brown stains on a silver coin. All of mine that have anything on them, the stain is black. I did check the coin with a magnet, and it does not stick.
PS: I did try to wipe it with warm water, and nothing happened. I also tried to wipe it with some Wright's Silver Cream, but that did nothing either. Is using this cream recommended for use on coins? I know it's really meant for silverware. |
Big no-no ! Using anything like that is harmful to the coin. In fact just wiping the coin with a cloth, or even your finger, is harmful to the coin.
What is on your coin is toning, that's all. And before those black spots you mentioned were black - they were brown at some point. Toning has many stages. It gradually progresses over time and changes color. It can virtually be any color you can imagine.
Now if you want to remove it, a commercial coin dip will do the trick. But coins dips are acid and they will remove a thin layer of metal from the coin. That's why they remove toning. The color is IN the metal, not ON it. So it cannot be removed without removing metal.