Iolite

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Iolite \I"o*lite\ ([imac]"[-o]*l[imac]t), n. [Gr. 'i`on a violet
     + -lite.] (Min.)
     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}. A variety
     called {Caribbean iolite} has a lighter blue color.


     [1913 Webster +PJC]