Space Calcite

The Vikings dominated the North Atlantic for centuries. But without a compass, with endless days and nights and cloudy skies almost all the time, they could only rely on one magic stone to guide themselves. The Vikings are believed to have used the spade by making it a charcoal cross in the middle

Norse legends tell us about a curious artifact called solarsteinn –sunstone – that allowed them to orient themselves during cloudy days and even at night. The sagas also tell us that while sailing the sailors held the stones by projecting them into the sky and spinning them