argentite

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ar·gen·tite

 (är′jən-tīt′)
n.
A valuable silver ore, Ag2S, with a lead-gray color and metallic luster that is often tarnished a dull black.

argentite

(ˈɑːdʒənˌtaɪt)
n
(Minerals) a dark grey mineral that consists of silver sulphide, usually in cubic crystalline forms, and occurs in veins, often with native silver. It is found esp in Mexico, Nevada, and Saxony and is an important source of silver. Formula: Ag2S

ar•gen•tite

(ˈɑr dʒənˌtaɪt)

n.
a dark, lead-gray, sectile mineral, silver sulfide, Ag2S, occurring in crystals and as formless aggregates: an important ore of silver.
[1830–40]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.argentite - a valuable silver ore consisting of silver sulfide (Ag2S)
Ag, atomic number 47, silver - a soft white precious univalent metallic element having the highest electrical and thermal conductivity of any metal; occurs in argentite and in free form; used in coins and jewelry and tableware and photography
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition