sylvanite Meaning, Definition & Usage

  1. noun a silver-white mineral consisting of silver gold telluride; a source of gold in Australia and America
    graphic tellurium.

WordNet

Syl"van*ite noun
Etymology
So called from Transylvania, where it was first found.
Definitions
  1. (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.

Webster 1913