Iolite is known as the “Viking’s Compass” and symbolizes vision, intuition, and journeying together.
Pleochroic. When you turn iolite, you'll see three distinct colors in three crystal directions.
Strongly pleochroic iolite has been incorrectly called “water sapphire,” as it can display a blue to violet hue in one direction and pale yellow to colorless in another.
https://en.wikipedia.org/wiki/Cordierite
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