Hypertext Webster Gateway: "stephanite"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Stephanite \Steph"an*ite\, n. [So named after the Archduke
Stephan, mining director of Austria.] (Min.)
A sulphide of antimony and silver of an iron-black color and
metallic luster; called also {black silver}, and {brittle
silver ore}.
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