sylvanite

Syl"van*ite, n. Etym: [So called from Transylvania, where it was first found.] (Min.) Defn: 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.]

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