pottery?

Hello, I'm here to request information on this object, My family found this in South Carolina many years ago. It's been in the house for some time. We never got any information on what this object was or is. This object was found In the coastal marsh. Due to the area's history, I thought it...

Need a little bit of help, So came across this sort of oblong thick piece at a park in Southeast Pennsylvania. Was hesitant to pick it up wasn't sure if it was bone or something else can anyone identify it, especially most importantly if it's bone or not And if it is bone has it been modified...