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Mineralpedia Details for Getchellite

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Getchellite

Getchellite

Named for the type locality at the Getchell mine in Humboldt County in Nevada, USA. Getchellite forms at its type locality “in an epthermal gold deposit formed in a narrow, steeply-dipping fault zone cutting interbedded, [presumably] Paleozoic shales, argillites, and limestones near a granodiorite intrusive.” Localities include in Iran, Russia, Kyrgyzstan, Japan, and newer localities in Pakistan, France, China, and Azerbaijan.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/getchellite.pdf

Formula
SbAsS3 
Crystal System
Monoclinic 
Crystal Habit
Micaceous 
Cleavage
Perfect, None, None 
Luster
Vitreous - Pearly 
Color
blood red, dark red, purple red 
Streak
orange red 
Class
Monoclinic - Prismatic 
Fracture
Flexible 
Hardness
1.5-2 
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Getchellite from Khaidarkan, Kyrgyzstan

Getchellite
            from Khaidarkan, Kyrgyzstan

Red, micaceous, cleavages to 7mm in Calcite matrix.

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Getchellite from Getchell mine, Humboldt Co., Nevada, United States

Getchellite
            from Getchell mine, Humboldt Co., Nevada, United States

Red platy foliations of Getchellite to 3mm associated with orange-yellow Orpiment. 

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