Source : Webster's Revised Unabridged Dictionary (1913)

Paragonite \Pa*rag"o*nite\, n. [From Gr. ?, p. pr. of ? to
   mislead.] (Min.)
   A kind of mica related to muscovite, but containing soda
   instead of potash. It is characteristic of the paragonite
   schist of the Alps.

Source : WordNet®

paragonite
     n : a colorless or pale brown mica with sodium