Penny colors?

I'm just curious what causes pennies to be of different colors such as these 2? I have older ones as well like a 68, 73, 82 that have a nice gold tone to them as well, Just a curiosity, especially since these are of the same date and location.

 

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You posted a picture of two lincoln cents, where are the pennies?

 

To explain, pennies are English coins, cents are American (although penny is acceptable by most everyone) and copper can take on MANY tones as it ages.

 

I really can't be any clearer in what I'm asking, why do these 2 coins have different tones to them.

 

As soon as they leave the rolls and enter circulation they start to tone based on their environment.

 

One was made in January and one in December. But more likely one has been in circulation longer. There are a lot of nice clean coins from the late 50's to early 70's coming to market lately due to the last passing generation that saved them. JMO

 

How does one tell what month they were made in?

 

You don't tell. I was just jokeing abit.
The longer they are in circulation the more they change color.

 

A Coins appearance is in direct correlation to its environment. Take two new cents. Put one in your glove box and another on the dashboard in the sun. Wait two weeks and set them side by side and they will be different hues. Thing is, once a coin leaves the mint it becomes impossible to know what environmental conditions it will be subjected to. Everything from the perspiration on your hands to the temperature and humidity in the air affect the appearance of a coin.