Has anyone noticed the change in color of the clad coins made for circulation? I certainly see a big difference. When clad coins first appeared in the 60s, they all were a dark grey color. Compare a quarter or dime from the 60s to the state quarters of today. The state quarters are a very light grey, almost a silvery white. Wonder if the Mint has been experimenting with the 'mix' over the years. Something to consider.
My 1999 State Quarters have turned a lovely golden color. Don't know if it's the alloy or the Whitman Album that causes it.
If they are turning gold in color, this is caused by the metal toning. This is caused by so many different factors. Air quality, folders, holders, handling, and many, many more.
is that toning necessarily bad, or can it be good, like in silver coins i have a few state quarters that are a deep gold in color actually, i have noticed that 60s clad coins are a bit darker than the new ones, however the mint has not changed the alloy. it could be due to circulation conditions. if you are trult interested in this matter, i suggest that you look at clad examples from 60s mint or proof sets.
Toning is a preferrence. While it is technically a reaction that the coin is having with its environment, many people like atractive toning, and even pay more for it.
