Capgaronnite
A variety of Minerals

What is Capgaronnite?
Capgaronnite (HgS•Ag(Cl,Br,I)) is a mineral that forms small tufted aggregates or isolated crystals with a maximum width of 0.02mm and a maximum length of 0.1mm. This mineral is related to perroudite in chemical composition and crystal structure. Capgaronnite is associated with secondary minerals of Cu like olivenite, cyanotrichite, and tennantite.
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Capgaronnite Localities Map
See where Capgaronnite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Key Characteristics
Formation of Capgaronnite
Capgaronnite is a rare mineral that was observed in the Cap-Garonne copper-lead mine of Var, France. Capgaronnite is found in cavities of Triassic Conglomerate (geology) and Sandstone.
Quick Facts
Physical Properties
- Color
- Black, gray, greenish, yellow
- Density
- 6.19 g/cm³
- Streak
- Gray-black
Chemical Properties
- Chemical Formula
- AgHgClS Cl may be replaced by minor Br and I.
- Elements
- Ag, Cl, Hg, S

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