Should I be concerned???

[Fluffy_Farm_Friends]

We’ve gotten small eggs like this before, but this one is really dark. Could there be a problem with the chicken?

 

[rosemarythyme]

What in the... it almost looks like a tiny avocado?

 

[Clearwater Chicken]

Thats Crazy. looks like a mini emu egg

 

[Fluffy_Farm_Friends]

Thats Crazy. looks like a mini emu egg

Yeah, the color reminded me of an emu egg right away

 

[aart]

If it was laid by a green egger, then the darkness is probably just concentration of pigment.
Open it up and see what's inside.