Pyrargyrite
Pronunciation : Py*rar"gy*rite
Part of Speech : n.
Etymology : [Gr. (Min.)
Definition : Defn: Ruby silver; dark red silver ore. It is a sulphide of antimony and silver, occurring in rhombohedral crystals or massive, and is of a dark red or black color with a metallic adamantine luster.
Source : Webster's Unabridged Dictionary, 1913