Rock or Fossil ?

[Donvic]

I just got this Rock or fossil a week ago and i trying to find out what it could be , on the last 3 photos i use a digital microscope to get closes . At the last photo is inside and shell out side . Thank you for your time.

 

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[CaptEsteban]

Dinosaur egg. CONGRATULATIONS !!

 

[A2coins]

Dinasour egg I'm liking that idea with Easter and all

 

[Donvic]

I just got this Rock or fossil a week ago and i trying to find out what it could be , on the last 3 photos i use a digital microscope to get closes . At the last photo is inside and shell out side . Thank you for your time.View attachment 1701867View attachment 1701868View attachment 1701869View attachment 1701870View attachment 1701871View attachment 1701872

I think this is a Porcupine Bezoar?