Definition of "argentite" []

• A valuable silver ore, Ag2S, with a lead-gray color and metallic luster that is often tarnished a dull black. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "The most important ore mineral of silver is argentite (Ag2S, silver sulfide)."
• "The most important mineral of silver is the sulphide, argentite or"
• "Farther down it may be reprecipitated as native silver, argentite, and the sulpho-salts, by organic matter or by various sulphides."