I just love your attitude about digging. "Let's just dig it up and see!" You are not afraid to dig anything. I am the same way. By the way, the items you dug that looked like rocks but had a signal could have been meteorite chips. They will explode when they come through our attmosphere and scatter all about. Usually small pieces that look just like rocks. Some of them are billions of years old. Older than Earth. I have a few I had tested, and they are meteorites. I found one in our downtown park. They are worth lots of money. Mine are a certain type and worth thousands of dollars. So, keep any rocks that give you a signal.

let's go let's go treasure and adventure ✌👵