The first way is color , on copper coins a cleaned coin has a pinkish tint to it . On Nickel it could be light grey with no luster. On silver it will look very light in color ,dull appearance ,usually most if not all luster is gone .
Then there's the dark crud in and around the devices of the coin while the rest of the coin clean . It takes a little experience to tell a cleaned coin from an original one . Go to Google and practice on cleaned coins vs. non cleaned ones .
Then there's the dark crud in and around the devices of the coin while the rest of the coin clean . It takes a little experience to tell a cleaned coin from an original one . Go to Google and practice on cleaned coins vs. non cleaned ones .



















