Gabrielite
A variety of Minerals
What is Gabrielite?
Gabrielite is a rare thallium sulfosalt mineral with a chemical formula of Tl6Ag3Cu6(As,Sb)9S21 or Tl2AgCu2As3S7. It was first reported in 2002 for its occurrence in the Lengenbach quarry, Binntal, Valais, Switzerland, and named after Walter Gabriel (born 1943), a Swiss mineral photographer. This region was transformed during the greenschist-garnet/amphibolite facies of metamorphism. Due to this many rare sulfosalts like gabrielite are found in this part of Switzerland.
Gabrielite Market Value Calculator
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Gabrielite Localities Map
See where Gabrielite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- grey to black
- Hardness (Mohs)
- 1.5 - 2
- Density
- 5.38 g/cm³
- Streak
- blackish red
Chemical Properties
- Chemical Formula
- Tl6Ag3Cu6(As,Sb)9S21
- Elements
- Ag, As, Cu, S, Tl
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