Some Morgans acquired beautiful colors while sitting undisturbed in canvas sacks in bank vaults for dozens of years. Some Kennedy halves acquired beautiful colors while sitting between Taco Bell napkins or in sulphurous cardboard albums. Some coins stored in envelopes, albums or at the ends of paper rolls develop attractive toning. Different storage methods produced different looks. It is interesting to try to identify how various toned coins came into being.
MANY, MANY coins achieved marvelous colors through the skillful application of chemicals by coin doctors... some are so good, even the 'experts' cannot tell the difference... and people pay moon money for them... cooooooooooolllll However, Steve27 is right, it is all chemical decomposition of the surface.... One would think, in many cases, that it was the application of gold by the prices. Cheers, RickO
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It's all rust to me.