Found this strange chunk of something in a creek in southwest missouri, it weighs 6.3 grams feels like their is nothing in your hand when holding it, it is somewhat covered in something white and has a few tiny black spots on the white stuff and kind of has a sulfer type of smell, I know it's not a fossil but I was really hoping someone might have an idea of what it could be?
I thought of maybe old molted lead that cooled but I figured it would be alot heavier.