Bible Dictionaries
Iolite
Webster's Dictionary
(n.) A silicate of alumina, iron, and magnesia, having a bright blue color and vitreous luster; cordierite. It is remarkable for its dichroism, and is also called dichroite.
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Bibliography Information
Webster, Noah. Entry for 'Iolite'. Noah Webster's American Dictionary. https://www.studylight.org/dictionaries/eng/web/i/iolite.html. 1828.