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English: Acanthite, Silver
Locality: San Juan de Rayas Mine (Rayas Mine; Reyes Mine), Guanajuato, Municipio de Guanajuato, Guanajuato, Mexico (Locality at mindat.org)
Size: small cabinet, 6.4 x 4.3 x 3.7 cm
Silver pseudo. after Acanthite
This is truly a rare and unusual specimen. It is a significant piece, and I have not seen similar from Mexico in this style. Hoppered growths of large, unusually robust acanthite crystals, to 1.6 cm across, have been altered to silver here. The weight of this piece is clearly much heavier than it would be if these were still acanthite crystals, so it is not just a surface alteration. As an added bonus, some of the interstitial spaces contain chromium chlorargyrite, which is glassy and ivory colored. A unique and important specimen of a rare silver replacement for this locality. Silver pseudomorphs after acanthite are rare enough, and in crystals of this size...surprising. Ex. Dr. Miguel Romero Collection.
Deutsch: Akanthit, Silber
Fundort: San Juan de Rayas Mine (Rayas Mine; Reyes Mine), Guanajuato, Municipio de Guanajuato, Guanajuato , Mexiko (Fundort bei mindat.org)
Größe: 6.4 x 4.3 x 3.7 cm
Date before March 2010(2010-03)
Source Image: http://www.irocks.com/db_pics/new09/rom24b.jpg, Description: http://www.mindat.org/photo-266080.html
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