Strange Big Brook NJ Bone? Coral?

[Anna Marie]

Hi again, hoping this time I have something. From Big Brook, NJ. I cannot find anything like it on extensive research. It's not modern bone. Sorry for the US quarter as I have temp misplaced my tape measure.  The black smooth area on the top in the first pic is concave but not uniformly so. In one of the photos I put a pebble in there to try to show some depth it its not noticeable. Thanks again for any help! 

 

  

[Anna Marie]

[Anna Marie]

  

[Fossildude19]

Cropped, brightened, and enlarged: 

 

  

 

  

 

 

This looks like some sort of colonized/bored oyster shell, to me.   

 

@frankh8147  @Jeffrey P

[frankh8147]

I agree 100%. It's a larger Oyster with a lot of borings! It's a cool looking piece!

 

I really want to say the shell is Exogyra but it could be Pycnodonte too..

Edited April 15, 2021 by frankh8147

[Trevor]

42 minutes ago, frankh8147 said:

I agree 100%. It's a larger Oyster with a lot of borings! It's a cool looking piece!

 

I really want to say the shell is Exogyra but it could be Pycnodonte too..

 

+1 I agree

[OneLastSift]

16 hours ago, Trevor said:

 

+1 I agree

And another agree

[Anna Marie]

17 hours ago, Fossildude19 said:

Cropped, brightened, and enlarged: 

 

 

 

 

 

 

 

Thank you for all your help!!!!!! 

 

 

17 hours ago, Fossildude19 said:

This looks like some sort of colonized/bored oyster shell, to me.   

 

@frankh8147  @Jeffrey P

 

[Anna Marie]

Thanks everyone!! Everyone is so kind and helpful here!!!