I create these unique fossil stones with concrete, copper and sterling silver. Each one inch, half dome casting contains a shell, pebble or a smaller concrete sphere embedded within its center. Once the concrete is dry, I treat it with metallic paints and chemical patinas, oil paint, bronze powder, and seal them with a matte varnish. A sterling silver tube bail is soldered to a 1″ copper O ring to create the base. The stones are epoxied to the copper base, allowing the raw concrete to be visible from the back.  They hang from an 16″ or 18″ 2mm black rubber cord with a sterling silver clasp. Each one is formed on its own and are one of a kind!