What’s happening to some of my eggs?

[YardBird192]

Several, different breeds, of my eggs have started looking like they are spotted in some way. If you can zoom in on the picture, let me know what is going on.

 

[Wyorp Rock]

What do they look like if you candle them?
Maybe an increase in humidity? Hard to know.
https://thepoultrysite.com/publications/egg-quality-handbook/23/mottled-or-glassy-shells

 

[YardBird192]

That’s the adjective I needed...mottled. I couldn’t get that link to show me a full page so o will search it separately and see. I am in South Georgia so it is humid, but I started seeing this back during our winter. Thank you so much.