| Formula | FeS2 |
| Molecular mass | |
| admixture | As, Sb, Co, Cu, Tl, Bi |
| IMA Status | |
| Systematics according to IMA (Mills et al., 2009) | |
| Class | Sulfides |
| Group | Marcasite |
| Physical properties | |
| Color | brass yellow |
| Dash color | Greenish gray to black |
| Shine | Metal |
| Transparency | Opaque |
| Mohs hardness | 6-6.5 |
| fragility | Fragile |
| Cleavage | imperfect |
| kink | Stepped, uneven |
| Density | 4.8-4.9 g/cm³ |
| Crystallographic properties | |
| space group | |
| Syngony | Rhombic |
| Twinning | |
| Optical properties | |
| optical type | |
| Refractive index | |
| Birefringence | Missing |
| dichroism | |
| optical relief | |
| Dispersion of optical axes | Missing |
| Pleochroism | Missing |
| Luminescence | Missing |
| Diffusion | |
Strode Anna
Anna Strod – director of the jewelry online store Myjewels.ru Author and editor of the jewelry blog Myjewels.ru