Hardness: 6 - 6.5
Streak: Grayish black
Habit: Acicular aggregate
Colours: Bronze-yellow, darkening on exposure
| ||Crystal System: Orthorhombic|
Reaction with HCl: Very weak
Identification in hand sample:
Bronze-yellow colour and habit are indicative. Streak is also helpful.
Common in hydrothermal sulfide deposits, generally formed at low temperatures.
Industrial / ecomonic uses:
Can be used as source of sulfur and iron, but not normally economically valuable.
Polymorph of pyrite