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Acanthite with Pyrargyrite & Polybasite

#RW50555

Acanthite with Pyrargyrite & Polybasite

#RW50555
Availability
Sold
Size
14 x 8 x 5 cm - Cabinet 
Formula
Ag2S (RRUFF)
Locality
Proano mine, Fresnillo, Zacatecas, Mexico
Tagged
sulfide , ore specimen , silver

Large specimen of probably 75% Acanthite. The Acanthite is massive at the core but along much of the outer edges is free-standing melted-looking blobs so typical of Acanthite. There is also, although minor, plates of Polybasite and Pyrargyrite.

Acanthite

Formula
Ag2
Crystal System
Monoclinic 
Crystal Habit
Blocky, Skeletal, Arborescent 
Cleavage
poor to none 
Luster
Metallic 
Color
lead gray, gray, iron black 
Streak
shining black 
Class
Monoclinic - Prismatic 
Fracture
Sectile 
Hardness
2-2.5 

Data courtesy of Webmineral.

Collection
Robert J. Waidler Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Acanthite
On Dakota Matrix
Other Available Acanthite
WebMineral
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Mindat
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