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Iolite

How to Sell… Iolite

Consumers will love that, in legends, ancient Viking navigators used thin slices of iolite as filters to help locate the sun on cloudy days. Whether or not the tales are true, iolite (mineralogists call it cordierite) can be fashioned into beautiful gems. Strongly pleochroic (shows different colours from different crystal directions) iolite has been incorrectly called “water sapphire”, as it can display a blue to violet hue in one direction and pale yellow to colourless ...