Rock/fossel of some sort

[Pull_tab_mike]

Found this at a site I no longer will be able to hunt after this tuesday. Its about the size of an egg. I have two pics dry and one wet. I thought this rock was cool looking so I picked it up...

Thanks for any help.

PTM

HH

 

[pj4566]

looks like an egg from outerspace aliens. lol
cool find