What do you suppose is going on with this egg?

[doughouse]

My guess is maybe a calcium deposit?

 

[doughouse]

It's also a little cracked, which I assume is related.

 

[swampfox440]

I would not worry unless you it becomes a regular thing . Every now and then you may get a deposit . I agree with you .

 

[aart]

Shelling gland malfunction...shell was not formed properly.
Yes, nothing to worry about unless it continues to happen.