My Quarters Are Changing Colors And I Have Questions

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Author	Replies: 6 / Views: 2,667
MessyCupcake New Member United States 24 Posts	Posted 07/16/2022 1:32 pm Ok so they haven't actually changed, but I still have questions. What is the science behind these blotches? I am unsure what color to call them... Copper red? Shimmering bronze-ish? Look forward to the comments! Report this Post to the Staff

Dearborn Moderator United States 95089 Posts	Posted 07/16/2022 1:57 pm Well, to me they just look like they are stained or have been in a place that caused whet we call 'environmental toning' Collecting since 1972. Learning from then on "Tell me and I forget. Teach me and I remember. Involve me and I learn." - Benjamin Franklin 7070 type set coin count: 51/76 Uncirculated American Silver Eagles My American Silver Eagle Proof Collection Sacagawea Dollars Innovation Dollars Eisenhower-Dollars Kennedy-Half Dollars Washington-Quarters Roosevelt-Dimes Buffalo-Nickels 1938-2005 Jefferson-Nickels Lincoln-Cents Report this Post to the Staff
captainmandrake1 Pillar of the Community United States 878 Posts	Posted 07/16/2022 2:10 pm How are you storing them? Report this Post to the Staff
ijn1944 Bedrock of the Community United States 19129 Posts	Posted 07/16/2022 3:02 pm Agree with Dearborn--staining and/or exposure to an environmental agent. Report this Post to the Staff
Coinfrog Bedrock of the Community United States 94367 Posts	Posted 07/16/2022 4:21 pm Indeed tell us - how and where are you storing them? to the CCF! Report this Post to the Staff
silviosi Pillar of the Community Canada 6244 Posts	Posted 07/16/2022 4:57 pm What I see it is cupric oxide. The clad it is Ni-Cu alloy and sone foils of the clad are more porous then other. In some environmental conditions (ex: salty environment) the oxide will form and come on the surface of the coin. when you see this be aware that the core Cu is affected and it is irreversible. Sooner or later you will have a new color appear: green. Report this Post to the Staff
merclover Bedrock of the Community United States 10635 Posts	Posted 07/16/2022 11:32 pm Environmental tarnishing/staining/discolourization, probably caused by chemical reaction of some sort. Coins will sometimes look this way after spending part of their life in a car's cup holder after coffee and soda spills. Just post mint damage. Report this Post to the Staff
	Replies: 6 / Views: 2,667

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