layers

Find this in Northwest Louisiana. Multi layer with multi color in the close outline of a toad on top. Flip it over and there is a clearly a toad on bottom... there's a chipped "mouth" all 4 nubs where the legs are. And a little froggy tail between the back legs. Can someone please help...

My son brought this over, wanting to know if I could find out what it is. I thought u could find out on my own so I didnt get the best pics for you guys, I couldn't find anything. It almost looks like and feels like flint but not sure. The layers are confusing, I want to think it might be...

I found this rok about 3 years ago on a beach in Ayr, Scotland. It has a few interesting layers within the rock and I'm looking for help to identify whats going on with it!