Ancient lore has suggested that the Vikings used special crystals to find their way under less-than-sunny skies. Though none of these so-called "sunstones" has ever been found at Viking archaeological ...
Supply optical Calcite Crystal (Iceland Spar) both in raw material, semi-finished form or as finished components ready to be used. We supply optical Calcite Crystal (Iceland Spar) both in raw material ...
The idea that the Vikings navigated across the Atlantic using birefringent Iceland spar (calcite) to locate the Sun's position on cloudy days is surely one of the most ingenious and captivating recent ...
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