Black Spot in egg (doesn't look like embryo)

[Is that an Egg?]

My bantam stopped sitting on her eggs, and I don't really know when she started.
I put them under a heating lamp, then a heating pad, and eventually decided to make an incubator.
It has been hard regulating the temperature, and at one point it was 111° degrees. I'm worried I cooked them.
There are 6 eggs, 1 I believe is just a yolk, 2 look slightly promising, and the rest have a black spot in them.
What is this?
Is it too late to save them?

One picture is the normal, the other is the dark spot

 

[Rose Quartz]

The first 2 pictures look like a dead egg. Between day 7 to 10. Unless you can see blood veins that arent showing in the picture. Are these picture all the same egg? The big black spot in the 3rd picture is the yolk and embyo shadow.

In the top 2 pictures the orange shadow is the yolk the small black spot on a lighter dark blob is the embryos eye if its alive you should be able to see the little dark blob moving around on its own.

 

[Is that an Egg?]

The first 2 pictures look like a dead egg. Between day 7 to 10. Unless you can see blood veins that arent showing in the picture. Are these picture all the same egg? The big black spot in the 3rd picture is the yolk and embyo shadow.

In the top 2 pictures the orange shadow is the yolk the small black spot on a lighter dark blob is the embryos eye if its alive you should be able to see the little dark blob moving around on its own.

The first two pictures are the same egg, it accidentally copied.
I just went back and double checked for veins.
1) the 7-10 day embryo, I can't see veins
2) it's just yellowish orange and I can see a very faint shadow
3) it looks just like a yolk, maybe it stopped growing
4/5th egg) dark spot, no visible veins
5) faint veins, pure yellow

 

[Rose Quartz]

The first two pictures are the same egg, it accidentally copied.
I just went back and double checked for veins.
1) the 7-10 day embryo, I can't see veins
2) it's just yellowish orange and I can see a very faint shadow
3) it looks just like a yolk, maybe it stopped growing
4/5th egg) dark spot, no visible veins
5) faint veins, pure yellow

#1 dead
#2 clear or it could be really early in development.
#3 clear or could be really early.
#4/5th egg: with no viens it's dead though with darker ones I make sure I can't see any movement at all before I get rid of them.
#5 might still be alive it would be around day 3 or 4.

I would put #2 ,3, and 5 back in the incubator and check again later. it looks like they might have been added after she started sitting on the eggs. possibly from other hens sitting on the same nest to lay.

 

[Is that an Egg?]

Awesome, thank you so much