Fossilized bones, or rocks that look like bones?

[Esmerelda]

I found these under a ledge in the water at a small creek in North Central Texas. I don't know if they all belong together, but they were in the same place. Both pictures are of the same three items; I just moved them for a different angle shot.

 

[pepperj]

Lick them and see what you detect.
Here is a screen shot of why you can tell the difference.