Darkened Spots Around A Coin's Raised Areas

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Author	Replies: 4 / Views: 1,667
Hidalgo Valued Member United States 216 Posts	Posted 03/20/2021 3:11 pm I regularly see much older coins, which have been slabbed and certified as Mint State, having dark spots/areas around raised areas and the rims. I presume these certified coins have not been cleaned. How can most of the surface of these coins be clean and only the raised areas and rims be dark/discolored? Here is an example: https://www.ebay.com/itm/264913695062 Report this Post to the Staff

sel_69l Bedrock of the Community Australia 21788 Posts	Posted 03/20/2021 6:53 pm ebay item either sold or withdrawn. Report this Post to the Staff
Hidalgo Valued Member United States 216 Posts	Posted 03/20/2021 6:55 pm Here is a link to another ebay auction, which shows similar darkening near the raised areas. https://www.ebay.com/itm/1936-S-U-S...264913695062 Report this Post to the Staff
Greasy Fingers Pillar of the Community United States 7108 Posts	Posted 03/21/2021 9:44 pm Anybody......Anybody....I'm waiting to hear an explanation.... Report this Post to the Staff
Conder101 Bedrock of the Community United States 17884 Posts	Posted 03/22/2021 09:21 am In the case of the first coin it has spent years in either a paper wrapped roll or in a cardboard holder. The paper/cardboard contained sulfur compounds which caused the coin to tone/tarnish and the area around the rim/edge of the coin that was in closest contact with the paper/cardboard has toned darker than the rest of the coin. Report this Post to the Staff
	Replies: 4 / Views: 1,667

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