Another "Whats your opinion on my Eggs?" question

[muskrat24]

Hello my fiance has been trying to start breeding leopard geckos and she has been having a hard time getting started. She finally has gotten a pair of eggs. Unfortunately they are attached together and I do believe the one is infertile as it is a straight yellow color. Where as the other one looks like this. I have candled chicken eggs before and know that veins are a good sign. I guess we are just curious if this looks like it is progressing as a healthy egg. Thank you for your time.

 

[telliott4]

Looks ok to me.

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[KaitouCat]

That egg definitely looks fertile also you might be able to gently pry the eggs apart as I've had this happen a couple of times, you just have to be very careful and don't use water to try and separate them.
I'm not entirely positive if it would be to harmful to leave fertile stuck eggs together but I certainly would not recommend leaving a dud egg stuck to a good egg until it rots.