From SE Iowa creek bed this morning. There are 2 rocks in the photo. The left hand rock was too cool to omit, but the right hand rock is the one I question. It has remnants of crystal and and small bubble-like cysts that remind me of a geode. The outside is bumpy and drab. I’m not terribly far from Geode State Park or Keokuk (the geode Mecca of the area). Thoughts?
