Source : Webster's Revised Unabridged Dictionary (1913)

Pinite \Pi"nite\, n. [L. pinus the pine tree.]
   1. (Paleon.) Any fossil wood which exhibits traces of having
      belonged to the Pine family.

   2. (Chem.) A sweet white crystalline substance extracted from
      the gum of a species of pine ({Pinus Lambertina}). It is
      isomeric with, and resembles, quercite.

Pinite \Pin"ite\, n. [So called from Pini, a mine in Saxony.]
   (Min.)
   A compact granular cryptocrystalline mineral of a dull
   grayish or greenish white color. It is a hydrous alkaline
   silicate, and is derived from the alteration of other
   minerals, as iolite.

Source : WordNet®

pinite
     n : grey or green or brown mineral similar to mica and
         containing aluminum and potassium sulphates