Emily Dickinson Lexicon

I'O-LITE, n. [Gr. ιον, a violet, and λιθος, stone.]

A mineral of a violet blue color, with a shade of purple or black, called also dichroit and cordierite. It occurs in regular six-sided prisms. Its varieties are peliom and steinheilite. Cleaveland. Note. By the regular principles of pronouncing the Greek iota and the Shemitic jod, this word ought to be pronounced yolite.