Chalcopyrite
CuFeS2
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Chalcopyrite is the most important copper ore mineral and occurs in virtually all sulfide deposits. It is often confused with pyrite but can be distinguished by its deeper yellow color, lower hardness, and greenish-black streak.
| Crystal System | Tetragonal |
| Mineral Class | 02 Sulfides and Sulfosalts |
| Mohs Hardness | 3.5-4.0 |
| Specific Gravity | 4.10-4.30 |
| Color | Brass-yellow, often with iridescent tarnish |
| Luster | Metallic |
| Streak | Greenish-black |
| Cleavage | Poor |
| Fracture | Conchoidal to uneven |
| Transparency | Opaque |
| Crystal Habit | Tetrahedral, massive |
Mohs Hardness
Mohs Hardness: 3.5 – 4.0
1 Soft10 Hard
Crystal System
TetragonalExplore on Science FYI
Frequently Asked Questions
What is the hardness of Chalcopyrite?
Chalcopyrite has a Mohs hardness of 3.5-4.0.
What crystal system does Chalcopyrite belong to?
Chalcopyrite crystallizes in the Tetragonal crystal system.
What color is Chalcopyrite?
Chalcopyrite is typically Brass-yellow, often with iridescent tarnish.
What type of luster does Chalcopyrite have?
Chalcopyrite exhibits a Metallic luster.
What is the chemical formula of Chalcopyrite?
The chemical formula of Chalcopyrite is CuFeS2.