Umangite
A variety of Berzelianite-umangite Group
What is Umangite?
Umangite is a copper selenide mineral, Cu3Se2, discovered in 1891. It occurs only in small grains or fine granular aggregates with other copper minerals of the sulfide group. It has a hardness of 3. It is blue-black to red-violet in color with a black streak. It has a metallic luster. Umangite is named after the locality of Sierra de Umango, La Rioja province in Argentina. It also occurs at other localities including the Harz Mountains in Germany, and at Skrickerum, Sweden.
Market Value Factors
Pricing varies for every rock and mineral, so use these universal factors to gauge Umangite 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.
Umangite Localities Map
See where Umangite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Quick Facts
Physical Properties
- Color
- Red, bluish red-black, iridescent violet-blue (tarnished)
- Hardness (Mohs)
- 3
- Streak
- Black
Chemical Properties
- Chemical Formula
- Cu3Se2
- Elements
- Cu, Se
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Umangite FAQs
How do I identify Umangite?
Umangite can be identified by its hardness of 3 on the Mohs scale, Red color. Look for these key characteristics when examining specimens.
What color is Umangite?
Umangite typically appears in Red, bluish red-black, iridescent violet-blue (tarnished). Color can vary depending on impurities and formation conditions.
How hard is Umangite?
Umangite has a hardness of 3 on the Mohs scale. This makes it a soft mineral that can be scratched easily.