Ha! I saved this little busy specimen til I was more confident my pictures were fairly decent.

[TinySpiderMonkeyNinja]

This little one is packed full of pretties, mysterious, and wonder! I would love to know about all of the surprises in this one, anyone that can teach me is welcome to shout it out!  Have fun with this one! Thank you so much! I am excited to finally know!

[hemipristis]

Where was this found?

[Mahnmut]

I do see bivalve shells and an interesting mineralization.

Cheers, J

[TinySpiderMonkeyNinja]

Thank you! I am always so amazed at the absolute magic that nature can perform! 

[TinySpiderMonkeyNinja]

10 hours ago, hemipristis said:

Where was this found?

This is from the Missouri riverbank side of the Mississippi River channel that cuts right between West Alton/Stl. Louis county Mo, and Aton IL The Great River Road that runs through Grafton Il. 

[TinySpiderMonkeyNinja]

Does anyone else have suggestions on the large claw shaped part?

[JohnJ]

It looks like chalcedony replaced and eroded bivalves, or brachiopods, or corals(?) in varying angles of cross section.