What are these clusters in egg white

[Starfall Pastures]

Hello, can anyone help me out with identifying what these blue clusters are in this egg white?

This egg was laid by our only cream legbar hen. She is 8 months old. As with her breed the egg shell is a sky blue color; similar to those clusters. This has happened only once before with her. She has always lain the worst quality shells of our flock. Some having bumps on the tops and usually having a weaker/thinner shell. None of my other 7 hens have any issues with their eggs. Oyster shells are avaliable daily.

 

[sourland]

Those look like pigmented calcium deposits that for some odd reason have been included in the egg rather than on it.