Stippling on outer shell on egg?

[TUCTOWNCHICKENS]

Hello i got an egg this morning and it had some rough little stippling specks on it and im not sure what it is and have never seen it before. Need help...

 

[sunflour]

Here's a link to an article that may help:

[Article] Common egg quality problems

If what you see isn't shown there, post a pic for more opines.