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Pyrite (crystalline)FeS2
Class: Sulfide Hardness: 6 - 6.5 Density: 5.0 Streak: Greenish/brownish black Lustre: Metallic Habit: Perfect cubic crystalline habit. Colours: Bronze-yellow | | Crystal System: Isometric Cleavage: Good Fracture: Conchoidal Magnetism: Unknown Reaction with HCl: None | Identification in hand sample: Colour, hardness, streak and habit are best indicators. Gives off sparks when struck with a hard metal object. Associations: Most common sulfide mineral, almost always present in hydrothermal deposits. Industrial / ecomonic uses: May be used as source of iron or sulfur, but not normally of economic value. |