WHAT ARE THESE?

[Medic2525]

I found these in my flower beds around my house. I've been noticing some small little fossilized type sea shells that are really tiny in general. I've also found a few other items that I'm really curious about.

The first item found looks like a tooth and I'm trying to figure out if it is or not as well as if it is indeed a tooth if it is something that is prehistoric. 

 

The other few pictures look like cylindrical rocks that are the same in size and shape. They each have an end on them that looks sort of like they've been clamped and it has a indentation on that end of the rock as well. However the interesting part is that the one that I found that was broke open has almost like a white hard substance on the inside. For the life of me I have researched this and can't figure out what it is. Any help would be greatly appreciated. Thank you very much.

[Fossildude19]

Welcome to the Forum. 

 

Not seeing any teeth here - no enamel present, and no bone/root texture.

 

The second image looks like possibly some gastropod shells covered in some sort of matrix, perhaps.

Not sure.

 

Cropped and brightened: