Source : Webster's Revised Unabridged Dictionary (1913)

Sylvanite \Syl"van*ite\, n. [Fr. Transylvania, where first
   found.] (Min.)
   A telluride of gold and silver, {(Au, Ag)Te2}, of a steel
   gray, silver white, or brass yellow. It often occurs in
   implanted crystals resembling written characters, and hence
   is called {graphic tellurium}. H., 1.5-2. Sp.gr., 7.9-8.3.

Sylvanite \Syl"van*ite\, n. [So called from Transylvania, where
   it was first found.] (Min.)
   A mineral, a telluride of gold and silver, of a steel-gray,
   silver-white, or brass-yellow color. It often occurs in
   implanted crystals resembling written characters, and hence
   is called {graphic tellurium}. [Written also {silvanite}.]

Source : WordNet®

sylvanite
     n : a silver-white mineral consisting of silver gold telluride;
         a source of gold in Australia and America [syn: {graphic
         tellurium}]