If a person has a gallstone then is it medically possible that the gallstone could gradually & naturally disintegrate or can only medical intervention remove it?

Gall stone: It is very rare for a gallstone to disintegrate, either naturally or by intervention. However, gallstones start as crystals and grow like a crystal grows. Some particles form only as gravel. Gravel can pass. Gravel can flake a bit. Bile in gall bladders moves with meals. The gall bladder contracts and squirts bile and this process can stir up gravel, and thus mitigate some stone formations.