pyrargyrite

English

Etymology

Greek: fire + silver

Noun

pyrargyrite (plural pyrargyrites)

1. (mineralogy) Ruby silver; dark red silver ore. It is a sulphide of antimony and silver, Ag₃SbS₃, occurring in rhombohedral crystals or massive, and is of a dark red or black color with a metallic adamantine luster; it is an important silver ore