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Dominant species
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Berthierite
Berthierite
Chemical
Formula
FeSb2S4
Species
Sulfides
Crystal
System
Orthorhombic
Mohs
Scale
2-3
Specific
Gravity
4.64
Color
steel grey
Streak
Dark brownish-grey.
Luster
Metallic
Diaphaneity
Opaque
Cleavage
Poor/IndistinctIndistinct prismatic.
Crystal Habit:Prismatic on, and striated parallel to . Prismatic to fibrous massive, plumose, radial; granular.
Geological Setting:Low temperature hydrothermal veins rich in antimony and deficient in sulfur

Berthierite is a mineral, a sulfide of iron and antimony with formula FeSb2S4. It is steel grey in colour with a metallic lustre which can be covered by an iridescent tarnish. Because of its appearance it is often mistaken for stibnite.

It was discovered in France in 1827 and named for the French chemist, Pierre Berthier.


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