description Iolite Overview
Iolite is a silicate mineral also known as cordierite, famously utilized by Viking navigators as a polarizing lens, or sunstone, to determine the sun's position on overcast days.
insights Why this score
Iolite ranks #123 of 184 in the Gemstone ranking, behind Pietersite, ahead of Azurite.
help Iolite FAQ
How good is Iolite?
Iolite scores 5.06/10 (Mediocre) on Lunoo, making it rated in the Gemstone category.
What are the best alternatives to Iolite?
See our alternatives page for Iolite for a ranked list with scores. Top alternatives include: Tanzanite, Indicolite Tourmaline, Rhodolite Garnet.
How does Iolite compare to Tanzanite?
See our detailed comparison of Iolite vs Tanzanite with scores, features, and an AI-powered verdict.
Is Iolite worth it in 2026?
With a score of 5.06/10, Iolite is a solid option in Gemstone. See all Gemstone ranked.
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