Three minerals from Scandinavia that may be the legendary Sunstones of the Norse navigators. Demonstration of the double refraction of Iceland spar (calcite), ...
Viking Sunstones - Double refraction of Calcite "Iceland spar" - Viking solstein
If you chose Desert Sunstone or Petrified Amber Rock...
1 - 01, Oregon Sunstone, Emerald Cut, 1.27 carats