Here is a polished Kentucky agate. It a great mineral found here in the state and while it does not quite fit fossil theme of this blog may...

Here is a clam called Paracyclas elliptica from the Devonian period. It was found in Clark County, Indiana in the Silver Creek formation.

Here is a large rock with at least two Archimedes bryozoan spirals showing. The rock also contains maybe 3 blastoids and maybe 1-2 stem pi...