Iolite

According to legend, iolite is called the Viking Compass Stone. It’s said that thin slices of iolite served as glare-reducers and polarizing filters that helped ancient Viking navigators locate the sun on cloudy days. This allowed the Nordic mariners to pinpoint their own location on the seas. The name iolite comes from the Greek word ios, meaning “violet.” Some believe that the gem aids sleep and helps to unlock creativity.