Bug eggs on Chicken eggs?

[Jordan01]

I saw these clusters of what looks like calcium deposits at first but they scraped off very easily so I'm worried they're bugging eggs. Anyone know what these are?

 

[HappyClucker7]

I found that on one of my eggs once. I'm pretty sure it's just calcium deposits, especially since I got this in the middle of winter when there were no bugs.. I scraped them off and used the egg. I haven't seen it again.

 

[aart]

Yes, calcium deposits.

 

[viennaproto]

Yup those are calcium deposits! Here is another example that looks just like yours.