is it possible for an egg to be too thick to see much when candling or is it most likely infertile. it is one more than the other of the cochin eggs she lays generally thick eggs but this one i cant see through as much as the other.
Depending on your light, it's definitely possible. Marans and other dark layers are sometimes impossible to see. I have lavender orpingtons too, and even as light colored as their shells are, they can be very difficult to candle. My cochins, seramas, chocolate orpingtons, OEGBs and ducks are much easier to see into.
Flashlight with at least 250 lumens is good, the higher lumens the better

Edit to add - if it looks really dark inside the egg very early on, it could be rotten too, so always do a sniff test! Smell it for any bad odors, just to be safe.
candled eggs, and nice development in all of them
awesome!
