Shell to thick to see through?

[Alecia Davidshofer]

I got these buff laced brahama eggs. When i got them they had a calcium shell white on top of brown shell. Is it possible that an egg is too thick to candle or see through? I tried today but i cant see through them.

Thank you

 

[RodNTN]

Are you candling them right?

 

[mill-j]

When i got them they had a calcium shell white on top of brown shell

Did these chickens lay eggs with two layers??