Irish 5p 1993 wrong metal error?

Hello,
My mum recently gave me this coin found it in a jar with keyrings etc.
I put it in my 1993 5p gap thinking this way a normal coin everything except the metal is normal (diameter design etc.)
Today I went to a car boot sale and bought a few pre euro coins (around 50)
When I came home to fill in gaps in my album I noticed that it was a different colour to my others (in the picture)
How valuable is this coin?

 

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I`m taking this to a man next weekend to look at it, but if you can help me please do :hail:
Thanks

 

It looks like enviromental damage. I have local coins that I've dug up with the same appearance.

 

what coloris the coin???

 

Its bronze/circulate copper look

 

Looks like its been on a BBQ

 

There looks to be too much detail for it to have been dug up, but it is possible

 

I agree, enviromental damage of some sort. I have several coins that have the same look to them but don't know what caused it.

Bruce

 

It may be environmental. If you have a balance, weigh it to see if it matches other coins. If not, then its a different metal.

 

I've found coins that could be MS if it wasn't for the staining and micro scratches.