U.S.A. 1 cent Lincoln Commemorative

Hi, i would like to ask to the expert an opinion about these 2 coins i have.


As you can see, the left one is yellow... It's strange for me because the normal color i saw everywhere is copper color as for the right one. The weight are respectively 2.60 g and 2.52 g, diameter is 19 mm for both.
Do you have some explication?
Thank you

Making "golden" copper coins is a common chemistry experiment in Germany and elsewhere. I made them when I was bored in the lab waiting for a solution to persipitate.

gold colorized for gift sets, many available on that auction site

What is this word colorized? ... Surely you mean colourised.

I have lost count of how many descriptions I have had to correct on Australian Coins that were uploaded with this incorrect spelling.

Mike

If you want to have your fill of unnecessary U's ... here you go --> fr.numista.com

Citeer: "brismike"​What is this word colorized? ... Surely you mean colourised.
​
​I have lost count of how many descriptions I have had to correct on Australian Coins that were uploaded with this incorrect spelling.
​
​Mike

​

Citeer: "Idolenz"​If you want to have your fill of unnecessary U's ... here you go --> fr.numista.com

​Not unnecessary .. required if you are going to use proper English on an English language website.

Removing the U when it should be used and using a Z when it should be an S is so so wrong.
While we are at it Z is pronounced Zed not Zee.

Who cares, he was asking a question about a coin not if he was miss using or misspelt a word.

Thank you for your replies.
Do you think the yellow cent is just a joke or some kind of official token/coin?
This link confused me:
https://www.ebay.com/itm/2009-Lincoln-Bicentennial-24K-Gold-Plated-Penny-Collection-4-Coin-Set-In-Sleeve/143568576069?hash=item216d5a9e45:g:D64AAOSwhDJeSxAR

Only chipping in because of the "to put Us or not" part.
Color without the U = American english
Colour with the U = British english

No idea why anyone would call out or cause a fuss over this, it's all english in the end.

I do not think they are product of US Mint. I think they are private enterprise product packaged up prettily for sale to any one who fancies them. Would make a nice party favor for a 10 year old birthday