Mint Lustre
January 4th, 2009
Can sunlight affect a mint state or proof coins luster?
I could be wrong, but I don’t think so. Mint luster is imparted on a coin by the effects of the minting process. It is a physical aspect of the coin. Unless sunlight alone can change the physical aspects of the coin I don’t see how the mint luster could be affected.
Other elements in proximity or in contact with a coin may be affected by exposure to the sun and thus cause a change to the coin (think plastic holders) but I don’t think just sunlight can do the job.
Of course I don’t expect to leave such high quality coins exposed to any long term sunlight either.
Interesting question.
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