Iolite is a clean, beautiful stone that is still very affordable. It can be found in blue to purple to light gray colors. The Vikings used iolite as a light polarizer, using it to see through the haze and determine the exact location of the sun on overcast days. With a very strong pleochroism, iolite changes colors when viewed from different angles. Iolite is found in Myanmar (previously called Burma), Brazil, India, Madagascar, Sri Lanka, and the United States.