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1 item @ $125.00  

Polybasite with Pyrargyrite

#PD32991

Polybasite with Pyrargyrite

#PD32991
Availability
Sold
Size
9 x 6 x 5 cm - Sm Cabinet 
Formula
Cu(Ag,Cu)6Ag9Sb2S11 (RRUFF)
Locality
Freiberg dist., Erzgebirge, Saxony, Germany
Tagged
sulfide

Great larger specimen and although the photos do not do it justice because of the hghly reflective nature of the minerals, it is a terrific specimen. Under the scope you will see abundany deep red Pyrargyrite crystals with plates of silvery Polybasite. Comes with label of Arthur Kusche and US National Museum (Smithsonian), who acquire it from Carl Bosch. Good provenance (see provenance tab) with three older lables. Label matches number on specimen.

Polybasite

Formula
Cu(Ag,Cu)6Ag9Sb2S11 
Crystal System
Monoclinic 
Crystal Habit
Massive - Granular, Granular, Pseudo Hexagonal 
Cleavage
Poor, None, None 
Luster
Sub Metallic 
Color
black, dark ruby red 
Streak
reddish black 
Class
Monoclinic - Prismatic 
Fracture
Uneven 
Hardness
2.5-3 

Data courtesy of Webmineral.

Collection
Phillips Collection

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