Chicken eggs have a protective coating on them when laid. It often dries a different color, and can be washed off! In the video below you can watch the bloom dry as a whitish coating. Towards the end, I also show a different dark brown egg with the top layer of brown color which can be easily scratched off. That’s a different pigment layer and not the same as the bloom/cuticle, but it also interesting to see!
For a post explaining how egg color works, please check out: Colorful Eggs!