I've had more strange eggs this Spring alone than I've had in many years of eggs... a few days ago I opened a jumbo size blue araucana egg into the pan for my breakfast and not only was there the white and a HUGE yolk but there was a little mini egg in it the size of a shooter marble! The "shell" was kinda hard but a little bouncy like thick leather and it was a pale greenish color inside a membrane. I'm still kicking myself for getting rather grossed out and running it out to the cats before I thought to take a picture...
I did take a picture of my wrinkled eggs though.... I don't know what is up with this girl but every other day or three she's laying an egg with wrinkles! The days between, she's laying a normal, speckled brown egg.