I'm pretty sure it's a fossil.. Can anyone help identify?

[Giangiul]

Any help would be appreciated. Including whether or not I need better pictures. Thank you!

 

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[Charlie P. (NY)]

I don't see fossil. Looks more like quartz that formed in a fractured stone matrix.

 

[Planko]

I am in the same position. Very cool looking but not a fossil

 

[Giangiul]

Thank you for taking the time to answer. I appreciate the help. I'll keep looking.

 

[ArfieBoy]

I'm not sure it is a fossil, but picture No. 3 definitely looks like interior bone structure. Thanks for posting.