Unique Error Coins Comment [1998 Lincoln Cent]

The Toning of the coin is a rainbow

Also the "T" in trust is a different color

Toning is not an error. And can be very nice

When I see beautiful toning like this I am temped into thinking
'When too good to be true, it is too good to be true".

Easy enough to artificially tone a coin like this, a couple of methods:
1 rest coin on bleached white paper, on a window sill, until desired rainbow effect is acquired.
2. careful heat treatment at moderate temperature.

A problem arises, because in the right 'natural' conditions, a coin can acquire this sort of appearance as well.

And I cannot definitively tell the difference if such a coin has been artificially toned or not.
Thus,
I do not ascribe any extra value to nicely toned coins, artificial or not.

For that reason, when it comes to silver coins in MS+ grades,
I prefer them blast white with luster, over those that may have acquired attractive toning
Blast white with luster is much rarer than toned on coins over 100 years old.

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When it comes to ancient bronze coins in higher grades, the situation is the reverse. A thick rich patina not only enhances eye appeal, but much more importantly, it protects the metal beneath .

it all appears normal for me.

Vegas107 Reaction to the environment.