Are these lamination?

1: 1951-S 1c



2: 1927 1c



3: 1919 1c



4: 1925-D 5c

 

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Yes to laminations. Common issue on Wheat Cents.

 

As paddy said, yes, the surface has split (laminated). When a piece of the split surface comes completely off the coin as in the top image, I have heard folks use the term "delaminated."

 

Very common, yes as Paddy stated.

 

And nickels.