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Posts tagged 'toning'

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Posted in: News, News
2021-04-05 16:30:00

Coin Toning: What It Means, and How It Happens

If you spend enough time looking at coins, you may notice that they sometimes begin to exhibit surprising shades of color. They could have become a dark brown as the years passed or acquired a stunning rainbow patina in the time since they were struck. This effect is referred to as toning and is a natural process that occurs when the surface metal of a coin is exposed to certain chemical agents.