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.

Bibliography Information
Webster, Noah. Entry for 'Iolite'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​i/iolite.html. 1828.