WHAT STONES YOU CAN POLISH

WHAT STONES YOU CAN POLISH

Here's a simple and easy way to know. Its recommended that the stones you plan to polish in your rock tumbler to be harder than glass.

A very easy test to confirm if your stones are indeed harder than glass is to lay a piece of glass on a flat surface. Then with firm (not excessive) pressure drag a point of the stone across the glass. A powdery streak will be made. Blow away the powder.