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Acanthite : Ag2S, Gypsum : CaSO4·2H2O

Copyright © Rock Currier
 
 
minID: K66-TWC

Acanthite : Ag2S, Gypsum : CaSO4·2H2O

Copyright © Rock Currier  - This image is copyrighted. Unauthorized reproduction prohibited.

Acanthite crystals in Gypsum. Specimen in the A.F.Holden Collection, Harvard University. You rarely see good acanthite specimens from Butte, Montana and one wonders how man of them went through the crushers. Scale at bottom of image is one inch with a rule at one cm.

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Photo added: 3rd Mar 2009