Nagyágite

Nagyágite (Pb5Au(Te,Sb)4S5-8) is a rare sulfide mineral with known occurrence associated with gold ores. Nagyágite crystals are opaque, monoclinic and dark grey to black coloured. It was first described in 1845 for an occurrence at the type locality of the Nagyág mine, Săcărâmb, Hunedoara County, Romania. It occurs in gold–tellurium epithe...
Found on http://en.wikipedia.org/wiki/Nagyágite

Nagyagite

• (n.) A mineral of blackish lead-gray color and metallic luster, generally of a foliated massive structure; foliated tellurium. It is a telluride of lead and gold. • (n.) A mineral of blackish lead-gray color and metallic luster, generally of a foliated massive structure; foliated tellurium. It is a telluride of lead and gold.Nagyagite: ...
Found on http://thinkexist.com/dictionary/meaning/nagyagite/

Nagyagite

Nag'yag·ite noun [ So called from Nagyag , in Transylvania.] (Min.) A mineral of blackish lead-gray color and metallic luster, generally of a foliated massive structure; foliated tellurium. It is a telluride of lead and gold.
Found on http://www.encyclo.co.uk/webster/N/1
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