Strange 2015 2 pence coin.

[MACKSILKY.]

Hi guy's got this last week in my change. The coin seems to be discoloured. Can anyone of you experts tell me how this happens.

Regards jim.

[Nordle11]

Looks like heat to me, Jim. You can get similar effects using a heat gun.

I remember people used to use Taco Bell napkins because they contained sulphur (?), wrapped the coin in a napkin and inside tin foil for a few months and they come out with extreme colours. To each their own.