argentite

名词 argentite:

1. a valuable silver ore consisting of silver sulfide (Ag2S)

ar.gen.tite

n.（名词）
A valuable silver ore, Ag2S, with a lead-gray color and metallic luster that is often tarnished a dull black.
辉银矿：一种有价值的银矿，Ag2S，银灰色，具金属光泽，常失去光泽而成为暗黑色