When i get to mountain biome and need silver i take the materials to build a cart in my inventory up to the hut on the mountain i left all my ore in. I take the empty cart over to the side of the mountain where my boat is parked below. I leave the cart at the steepest part and run back and forth to fill it with the ore. Then i kick the cart over the side of the mountain and watch it tumble all the way down to the boat or somewhere close usually. its great.