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Miargyrite

#PD31020
SOLD
Miargyrite from San Genaro mine, Castrovirreyna, Huancavalica, Peru - PD31020
Miargyrite from San Genaro mine, Castrovirreyna, Huancavalica, Peru - PD31020

Miargyrite

#PD31020
Availability
Sold
Size
1 x 1 x 0.8 cm - Thumbnail 
Formula
AgSbS2 (RRUFF)
Locality
San Genaro mine, Castrovirreyna, Huancavalica, Peru
Tagged
sulfide

A small but significant little specimen of the rare sulfosalt Miargyrite that occurs as the highly reflective silvery-black matrix with striated <1mm crystals on one end. On the opposite end of the little piece the matrix appears to be more platy with thin crystals that have a more golden iridesence and lack striations. It's possible the Miargyrite is associated with it's rare polymorph Baumstarkite (TL), which occurs closly with Miargyrite at San Genaro, although the two are difficult to tell apart especially on such a small piece.

Miargyrite

Formula
AgSbS2 
Crystal System
Monoclinic 
Crystal Habit
Euhedral Crystals, Disseminated, Massive 
Cleavage
Imperfect, None, None 
Luster
Sub Metallic 
Color
steel gray, lead gray, blackish red, reddish gray 
Streak
cherry red 
Class
Monoclinic - Prismatic 
Fracture
Brittle 
Hardness
2-2.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
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On Dakota Matrix
Previously Sold Miargyrite
On Dakota Matrix
Other Available Miargyrite
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Mindat
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