Help me id these gems

[xoxloverox]

I was recently at a garage sale in Oklahoma, and I just moved here 3 weeks ago. I am a rockhound and just moved from Washington State. I noticed cool rocks alongside the driveway of the owners of the property with the garage sale. I asked the gentleman if I could look at his cool rocks (they were even stuck in the dirt because of tire tracks and being run over), he then said his wife inherited the property from relatives.  I asked who the rockhound was in the family, and he didn't have a clue, and didn't care about these rocks and told me that I could pick thru and take them.  I knew they were special.  I have posted the photos on Oklahoma Facebooks groups with no real answers. My gut tells me the "scale" looking ones are either fossilized skin or plant matter/limbcast. The etchings might be artifacts. Please help me ID these cool finds!

I will add that we are near water, near Eufala/Canadian river.