Where is a water stone in Pokemon diamond?

Yes because when you use your digging kit it takes forever to find one So here's a hint to find one FIRST dig kit screech for the YELLOW stars NEXT go and keep tapping the screen on your DS NEXT stay were you are and BEWARE of the WHITE stars!! NEXT find a wall were no other places were fond that means NO yellow stars only 1 OK KEEP trying in till you find AND reamer what ever you do DO NOT GO NEAR THE WHITE Stars if there is 1 or 2 Or a lot stay there and press the A button to pick it up.