Briartite
A variety of Minerals
What is Briartite?
Briartite is an opaque iron-grey metallic sulfide mineral, Cu2(Zn,Fe)GeS4 with traces of Ga and Sn, found as inclusions in other germanium-gallium-bearing sulfides. It was discovered at the Prince Léopold Mine, Kipushi, Shaba, Congo (Léopoldville) in 1965 by Francotte and others, and named for Gaston Briart who had studied formations at Kipushi. Briartite is also found in Namibia, Greece, and Spain.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Briartite before comparing listings or appraisals.
Size & Weight
Larger, intact specimens usually command higher prices.
Rarity & Demand
Scarce material or popular varieties sell at a premium.
Condition & Finish
Chips, repairs, and heavy wear lower value; clean prep helps.
Treatment & Provenance
Untreated specimens with documented locality are prized.
Briartite Localities Map
See where Briartite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- gray to gray blue
- Hardness (Mohs)
- 3.5 - 4.5
- Density
- 4.337 g/cm³
Chemical Properties
- Chemical Formula
- Cu2(Fe,Zn)GeS4
- Elements
- Cu, Fe, Ge, S, Zn
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Briartite FAQs
How do I identify Briartite?
Briartite can be identified by its hardness of 3.5 - 4.5 on the Mohs scale, gray to gray blue color. Look for these key characteristics when examining specimens.
What color is Briartite?
Briartite typically appears in gray to gray blue. Color can vary depending on impurities and formation conditions.
How hard is Briartite?
Briartite has a hardness of 3.5 - 4.5 on the Mohs scale. This gives it moderate hardness.
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