That 'knob' on the bottom of the rock broke off naturally.
This rock is in a situation of decay.
If anyone knows how to save it let me know.
Update
The small 'knob' on the back of this rock came off. In fact the whole rock is beginning to show signs of deterioration.
I have emailed Treasure Museum about this. I need to get this to a museum for preservation.
Something I did not mention about this stone was it's smell.
It smelled b-a-d ! When I got it back to where I lived I had to wash it 3 times in a solution of Lysol Disinfectant and hot water. Was it buried with disease? Was it in sewage? Was this just a normal occurrence for this smell to occur on it in this area of Sebastian?