A Serious Reflection on the Hobby of Rock Polishing
This summer while our family was vacationing in northern Michigan, we searched the rocky beaches and gravel piles for stones. “Petoskey stones.” Have you ever heard of them? The Petoskey Stone found anywhere in the Lower Peninsula of Michigan is composed of fossilized skeletons of colony coral (Hexagonaria: percarinata Sloss). It is a soft stone with irregular hardness. Not a pretty stone that catches the eye. But rather a dull colorless stone that is easily passed by. However, it does...