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0 item @ $0.00  

Gratonite

#AH55360

Gratonite

#AH55360
Availability
Sold
Size
3 x 1.5 x 1.5 cm - Thumbnail 
Formula
Pb9As4S15 (RRUFF)
Locality
Rio Tinto mines, Huelva, Andalusia, Spain
Tagged
sulfide

Long prismatic crystals to 1.5mm. These crystals are very similar to the type locality of Excelsior mine in Peru. The crystals are steel grey with trigonal terminations.

Gratonite

Formula
Pb9As4S15 
Crystal System
Trigonal 
Cleavage
None, None, None 
Luster
Metallic 
Color
lead gray, dark lead gray 
Streak
black 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Brittle 
Hardness
2.5 

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection
Mineralpedia
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