In the year 992 AD the Viking Leif Eriksson reached America as the first European. For a long time scientists have puzzled over the question how the Vikings with their dragon boats managed to navigate on the open sea. This secret is now revealed: Magic Sun Stones from Calcite showed them the way. With a stone like this the position of the sun could be determined with high precision, even under low light conditions and at dusk. The sunlight is refracted in the mineral depending on its alignment to the celestial bodies. Looking through the stone you can see two light beams. The stone must now be turned until both beams are equally strong - and the position of the sun is determined!

Natural calc-spar crystal, leather, ancient glass bead