Pyrite vs Siderite
| Property | Pyrite | Siderite |
|---|---|---|
| Formula | FeS2 | FeCO3 |
| Crystal System | Cubic (Isometric) | Trigonal |
| Mineral Class | 02 Sulfides and Sulfosalts | 05 Carbonates and Nitrates |
| Mohs Hardness | 6.0-6.5 | 3.5-4.5 |
| Color | Pale brass-yellow | Yellowish-brown, gray, brown, greenish |
| Luster | Metallic | Vitreous |
| Streak | Greenish-black to brownish-black | White |
| Transparency | Opaque | Translucent |
| Cleavage | Indistinct | Perfect rhombohedral {1011} |
| Fracture | Conchoidal to uneven | Conchoidal |