Iolite most commonly occurs in shades of blue-gray, violet or indigo. It displays a visual property called “pleochroism,” which means that it can appear to be different colors as it shifts in the light. According to Norse legend, Viking explorers used thin pieces of Iolite as the world’s first polarizing lens to help them determine the exact location of the sun for navigation.  Approx. Strand Length: 8-inch  Origin: Tanzania  Treatment: Natural  Approx. Bead per Strand: 40  Also Known As: Viking’s Compass, Water Sapphire, Dichroite  Approx. Hole Diameter: 0.8 - 1.1mm  Metaphysical Attributes: Calming, Balance  Chakra: Third Eye, Crown  Mohs Hardness: 7-7.5