THE VIKING STONE. Rough Raw Iolite Stone Washer Woman Engagement Ring Medieval Nordic Wedding Sterling Silver. Deep Purple Specimen

Iolite is sometimes referred to as "the Viking stone" because, according to Norse legend, Vikings used thin slices of iolite as polarizing filters, allowing them to look directly at the sun and use its exact location in the sky to navigate the open seas. If this is true, it would help explain how the Vikings supposedly managed to travel such great distances across massive expanses of ocean without modern navigational aides. Gorgeous deepest darkest purple is the color of Iolite. Here...