Brazos River Petrified Wood/Bone Questions

[Blxbrry]

I was walking along the many trails in the Sugar Land area near the Brazos River when I found a wonderful beach with many pieces of petrified wood. I'm very new to this world of fossils and rocks but I was quite intrigued by a piece of petrified wood with what I believed to be some fossilized sap (amber?). I was wondering if anyone could tell me more about this rock or the round piece of bone I found as well. Any input would be greatly appreciated!

 

-Blxbrry

[Harry Pristis]

The "round piece of bone" is an osteoderm from a glyptothere.  Good find.

 

 

[Blxbrry]

Thank you so much Harry!

[JohnJ]

The amber colored part of the wood is most likely chalcedony.  Still, there is the off chance it could be common opal.

[Blxbrry]

Thank you John!