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Cleaned Coins: How Do You Know.

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joeysanders627's Avatar
United States
408 Posts
 Posted 10/24/2016  8:41 pm Show Profile   Bookmark this topic Add joeysanders627 to your friends list Get a Link to this Message Number of Subscribers
I've been trying to hone my grading skills recently and I am getting better at it. The problem I am having is being able to tell whether a coin has been cleaned or not.

To the more polished graders, I ask, how do you know if a coin has been cleaned or not? I know one thing to look for is scratches all over a coin. That is obvious. What are some other signs that let me know if a coin has been cleaned?
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babysitr's Avatar
United States
1339 Posts
 Posted 10/24/2016  9:10 pm  Show Profile   Bookmark this reply Add babysitr to your friends list Get a Link to this Reply
Look for lack of mint lustre in unc coins, look for gunk in the devices, beware of "shiny" coins..and any time you can, look at straight graded coins, the TPG's can make mistakes ,,but not often....experience is the best teacher...talk to lots of experienced coin people.....others on this site will have tips also....this site will teach you a lot
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T-BOP's Avatar
United States
18456 Posts
 Posted 10/24/2016  9:25 pm  Show Profile   Bookmark this reply Add T-BOP to your friends list Get a Link to this Reply
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 .
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Coinfrog's Avatar
United States
94367 Posts
 Posted 10/25/2016  4:42 pm  Show Profile   Bookmark this reply Add Coinfrog to your friends list Get a Link to this Reply
Judging if a coin has been cleaned pretty much becomes second nature the more coins you handle and see at shops and shows. In some cases it's obvious, as you say, but I agree that color is perhaps the most important early red flag.
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panzaldi's Avatar
United States
18706 Posts
 Posted 10/26/2016  2:27 pm  Show Profile   Bookmark this reply Add panzaldi to your friends list Get a Link to this Reply
after years of experience I still go to ebay looking for slabbed coins labeled cleaned to look at them and determine if I can see what their graders saw to assign the label
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