have five pennies with green stains. this one is the worst with the stain or grease marking. even though it has coin wrapper marks on coin. fresh out of a roll from a box of 2021 pennies
if that green stuff can be moved with a toothpick. it's similar to what I've seen on fresh dimes recently, and I suspect it's green grease from the mint's press or from a machine where the coin was put in rolls
the green stuff can't be move but it is staining the coins. the other mark is a rough surface on the coin which has a little depth to it. I don't think it could be environmental since they came out of a box of stringer pennies from PA thanks for the info now that they are not keeper but spenders thanks again
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