help me guess who laid this egg

[jack & mommy's duckies]

I have call ducks and I also have a pair of white guinea's. Please help me guess. The egg above in the picture is a pekin egg. The egg in question also has a grayish film on it....kinda like how a scovie egg has a film but this is kinda grayish...dirty looking

 

[anaiyuk]

From what I've read, the duck eggs feel like they have a film or coating. I believe guineas are a little pointed at the end.

 

[Kansaseq]

Duck egg. Guinea eggs are smaller and sort of tan, if I remember correctly. They didn't have any kind of film.