1919 Mercury Rainbow?

Hi everybody. New to the coin talk site and to collecting. Recently, I bought a 1919 Mercury dime (Denver mint). It appears to have rainbow coloring on its obverse. Does this add any value, or is it just due to age? Thank you.

 

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Welcome to the forum Ftn.ofMorgans and yes indeed people will sometimes pay more for toned coins that are colorful and pleasing to look at. Also too, if the toning occurs naturally. This old sod (me) can generally take 'em or leave 'em, and for the right price, maybe buy one. There are many toning enthusiasts in these parts........

 

toning can add value to the right person.

 

I'm rather bearish on numismatic value (investment) for most US coins, but bullish on the toned-coin market segment(s).

 

As a toned coin collector, here is my opinion.
Unless the toning is something spectacular, toning only adds a premium to an already quality / uncirculated coin. Especially since the truly amazing toners have such nice eye appeal because of the mint luster in combination with the toning.

In the case of the one you posted, there would be no added value. When I see well circulated coins with toning like this, I go with the assumption it has been cleaned. Whatever was used to clean it will cause the toning.

 

Look at what it's done for George Hamilton.

 

Thank you all for your advice. This can help me much in the future.

 

Now there's a toner..........

 

Yes, but in my humble opinion, this is an extreme case of AT.

 

And large amounts of bag marks.

 

Bag or hag?