Petrified wood bone fragments identification

[ScandinavianBleu]

I found these both in my lake in Ottertail county MN. The first piece is 4" long by 2" high. Is it petrified wood?  How do you know how old it is or what type of wood? The second piece is 2.5" long by 1" and  I am wondering if it is petrified wood and part of a tree branch or a petrified bone . 

[Rockwood]

I'm less certain about the last two, but I'm afraid there is no clear indication that any are wood or bone fossils.

The stress should be on clear though. Some pieces are difficult to be certain of.

[abyssunder]

They look like rocks,to me.

[Vieira]

I agree. I don't see any fossils...

[Ptychodus04]

The first looks like a piece of agate or something like that. The second could be bone but it's hard to tell. One way to check is to lick your finger and stick it to the "bone". If it feels sticky when you pull away, it is cone. This is the capillary action of the bone drawing the moisture in.

[ScandinavianBleu]

The 

 

4 hours ago, Ptychodus04 said:

The first looks like a piece of agate or something like that. The second could be bone but it's hard to tell. One way to check is to lick your finger and stick it to the "bone". If it feels sticky when you pull away, it is cone. This is the capillary action of the bone drawing the moisture in.

 Did your test and the second piece is definitely sticky! Thank you for sharing this !