Found a very spherical rock coincidence? Or something else?

It could be a geode; geodes are often roughly spherical rocks that sometimes have interesting crystals inside.

Ill bet its sp gravity is about 2.5 to 2.7. Id call it an arkosic arenite (Red Sandstone with a lot of feldspar in it). Is it a natural shape or not? It looks like its a sort of a "paint pot" tool of native american origin. Theres a little depression at the center of the stone and its been used as a tool (I think).
Many times these rounded rocks would get caught in a river "pothole" which is a large round depression in which other rocks get transported into and these smaller rocks are tumbled and tumbled until their shape is very "artificial looking". Native Americans knew of these pothole stones and collected them and made paint pots (where they would grind red ochre for design uses ). The paint pots would last a long time but would gradually get more worn until the rock itself broke and the native Americans would get new ones.

Its not a geode, geodes have their outer shells look almost like an onion skin with sub parallel layers of different mixtures of country rock that was deposited in hot water mixes and then eroded out of the cavities in which they were formed.

Wow thank you very much I'll post more pictures

I'll reply once I find the tools to precisely measure sp gravity

This is interesting. I will have to show this to my son!!!