Good Morning, We found this penny in a jar we've been hoarding for some time. It is a little different and hubby keeps calling it a silver penny. It looks to be a copper penny with a "silver" wash. Scan doesn't show the shiny "pearly" finish.
Copper cents can have surface discoloration due to environmental factors that can seem to cover the rainbow. I have seen whites, greys, blacks, browns, blues, greens, yellows, etc. I use the plural with the colors to denote the many tints and hues in each color group.
Yours has the appearance of having something spilled on it. Whatever was spilled left a residue that dried, leaving a light, whitish film on the coin. Further evidence of environmental exposure to moisture is the greenish gunk seen on the inside rim. This is a more typical color of oxidized copper regardless of the whitish material mixed in.
As an interesting aside, do an internet search using terms "making silver pennies" and "making gold pennies". If you have the means and the desire, perform what used to be a common grade school lab experiment and see how long it takes hubby to figure out that your shiny silver and gold pennies are plated with zinc.