Are these bone fragments?

[diabeticwolf]

Hello,

I found these today in my grandmother's front yard among 4-tons of river rock she recently had installed. I believe they are bone fragments, but I was hoping to get some opinions (if I guessed right). I'm still learning, but I try my best.

The first four photos are the same piece from different angles.

[diabeticwolf]

I believe this is another bone fragment, but I'm unsure which bone it may be.

[diabeticwolf]

The first three are the same piece, the last one is a different one.

[Herb]

looks like bone to me also

[ynot]

Second on these pieces being bone.

Tony

[Rockwood]

The first two sets look very turtleish.

[diabeticwolf]

The first two sets look very turtleish.

Any idea what they could be? The second almost looks likes a scapula, but I could be wrong.

[Rockwood]

To be honest I don't know the terminology. What inspired my comment as it relates to the second set was the shell attachment points as seen in this modern Terrapin.

The bubbly texture in the first set is commonly assigned to turtle shell. I understand there are other less common possibilities though.