3 Photos
Umangite
Chemical Formula	Cu3Se2
Species	Sulfides
Crystal System	Tetragonal
Mohs Scale	3
Specific Gravity	5.62-6.78
Color	Red, bluish red-black
Streak	Black
Luster	Metallic
Diaphaneity	Opaque
Cleavage	Distinct on and
Fracture	Uneven
Crystal Habit：Massive granular

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.