Is anyone here good at finding stuff online? Details in description.

Was wanting to watch an old movie I liked but cant remember name. The only scene I remember was this. It's the gold rush in wild west. Someone found gold in a river. Now everyone swarmed there. The main character lifts a boulder out of the river just to move it and when it breaks the surface he sees its basketball size and pure gold. So he shoves it back down and comes back with friends to get it later that night. But word gets out and they get chased by bandits the rest of movie.