Question to 'CHEMINIST'

[Dozer D]

In relation to the greenish oxidation that happens to some copper pennies, can & will the greenish looking cancer spread to other coins that are kept in a container that are in contact with each other? When I usually see those, I return them to the wild, (unless it's a valuable coin). Comments!

 

[Diver_Down]

Yes, those that are in contact are susceptible to the contamination.