This was my girl's first clutch too. While they all looked good, a few on the bottom have become dark grey. I was going to separate these from the rest but so far they don't seem to affect the other eggs. Someone told me to separate but still incubate them as they could still hatch. The egg on top of the mass is still pearly white and I'm pretty sure that one will hatch. The darkened ones are on the bottom of the clutch and I think it was due to contact with perlite causing drowning, as I'm now being told there should have been an egg crate between the mass and the perlite.
Here's hoping for 4-5 hatchlings!
-----
It's just like the story of the grasshopper and the octopus. All year long the grasshopper stored up acorns for winter, while the octopus mooched off his girlfriend and watched tv. And then the winter came, and the grasshopper died, and the octopus stole all his acorns, and he got a race car. Is any of this sinking in?