Source : Webster's Revised Unabridged Dictionary (1913)

Ceylanite \Cey"lan*ite\, n. [F., fr. Ceylan Ceylon.] (Min.)
   A dingy blue, or grayish black, variety of spinel. It is also
   called {pleonaste}. [Written also {ceylonite}.]

Source : WordNet®

Ceylonite
     n : a dark-colored spinel containing iron [syn: {pleonaste}]