Ann: West Kimberley Exploration Update-RMR.AX, page-7

How to Polish a Turd

The easiest way would be to invest in a rock tumbler. You can find them in department stores and online from $15 to $600. Many come with grit and jewelry mounts. They range from beginner to hobbyist and professional, come in different sizes, and are either rotary tumblers or vibratory tumblers. The effect you’re trying to get with a tumbler is to do in a short period of time what rivers and oceans take years to do. The coarsest rock can become smooth. Your turd is no different.