Bone fragment or just rock?

[biopaleoartist]

Ok so I'm brand new here and I'm hoping you guys can help me out. I found this what I think is a fossilized bone (maybe skull) fragment washed up on the beach at westmoreland state park in montross virginia along the potomac river. The area, I believe, is part of the calvert cliffs along the chesapeake and therefore should be from the Miocene. I've been trying for months to figure out what this thing is and the best idea I have come up with is maybe a skull fragment from a miocene dolphin of some kind but I'm honestly not completely sure it's not just a rock. I may have gone overboard with the pictures but I wanted to make sure you guys had the best possible understanding of what this thing looks like. Its about 5cms at its widest point. Thanks for taking a look.

[biopaleoartist]

Just want to be thorough.

[ynot]

Welcome to TFF!

Sorry, but this is a quartz pebble, not a fossil.

[abyssunder]

Just a rock, not a bone fragment, unfortunately.

[biopaleoartist]

Yeah that's what I was afraid of. Not surprised though. Thanks guys for setting me straight on this weird looking rock!

[biopaleoartist]

Any thoughts on what could have given it its weird bone-like texture?

[ynot]

The void areas in Your rock could have been caused by other minerals that have eroded out or gas / fluid voids when forming. They are randomly distributed through the rock.

In a bone the pattern is much more uniform with a cellular appearance.