kuntry, have you checked out this thread? It's about candling chickens eggs, so the development timeline's will be off, but at least you get the general idea of what the veins and embryo development look like. Hope that helps!
And aren't Maran eggs super dark brown?
I will check out the thread. And yes, the Marans are SUPER DUPER dark brown, so VERY hard for me to candle.