Egg colour that changes

[Cornishboyraptor]

So I was on fb when I saw someone with an egg she got from one of her mixes that changes colour at different temperatures. When it warms up it becomes brown but at room temperature it becomes white (almost like it has extra calcium specks).

 

[nuthatched]

looks more like heavy bloom that is affected by moisture, pretty egg though.

 

[Cornishboyraptor]

looks more like heavy bloom that is affected by moisture, pretty egg though.

Could the bloom be repetitive?

 

[AusHen]

bloom is effected by moisture rather than temperature. when moisture is added the bloom becomes transparent showing the true colour of the egg, when it dries it becomes opaque changing the appearance of the egg. I have had a few hens with thick bloom. a brown layer that always has pink/purple looking eggs and a green layer that sometimes lays an egg that looks lighter green to blue

"Pink egg" with a little water showing the true colour


All from the same hen, one really heavy bloom


Sadly non of their daughters have thick bloom. I did read once that if you hatch a rooster from a hen with thick bloom his daughters might carry it on, but I have not tested that yet. I do know that diet can cause it, especially excess calcium

 

[STACEYH]

I get eggs like that also when washed well they turn a nice brown. The bloom can be so heavy they looked pink.