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Parapierrotite

#11180
SOLD
Parapierrotite from Lookout Pass, Tooele Co., Utah, United States - 11180
Parapierrotite from Lookout Pass, Tooele Co., Utah, United States - 11180

Parapierrotite

#11180
Availability
Sold
Size
6 x 3.5 x 1.5 cm - Sm Cabinet 
Formula
TlSb5S8 (RRUFF)
Locality
Lookout Pass, Tooele Co., Utah, United States
Tagged
thallium

Silvery crystal grains to 1-2mm throughout this silicoues matrix colored black by organic matter. There may be a relation between the thallium minerals and the black organic matter. A handy short reference on this deposit can be found here (click). There are probably other thallium minerals in this specimen but identifying them is difficult and requires thin section work and/or EDS.

Parapierrotite

Formula
TlSb5S8 
Crystal System
Monoclinic 
Crystal Habit
Prismatic 
Cleavage
None, None, None 
Luster
Sub Metallic 
Color
black 
Streak
gray 
Class
Monoclinic - Prismatic 
Hardness
2.5-3 

Data courtesy of Webmineral.

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