How to Tumble and Polish Stream or BeachRounded Rough
Just be sure that you have lots of small rocks (or media) to prevent the large rocks from crushing one another during the tumble. Add enough water to barely cover the rocks. The starting stones were all about 1 inch to about 1 1/4 inch across, and they lost about 1/8 inch all the way around during the tumble making them about 3/4 inch to 1 ...