If you've been to the North Shore of Lake Superior you will have run into this fabulous stone. Thompsonite, or Tompsonite is a wonderfully colorful stone that is formed in a basalt parent rock.
It is not easy to come by and usually quite expensive. This little nugget is as tall as it is wide.
Ive set it using a fancy bezel with no other trim. It measures 3/4" and hangs from a sterling link chain that is 18"