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Physical Properties
| Crystal System: IsometricCrystal Form: Rhombic dodecahedron and tetrahedron Habit: Granular, reniform or botryoidalHardness: 3.5-4Cleavage/Fracture: Rhombic dodecahedron ,{011} Cleavage: Perfect Luster: Greasy Color: Colorless, yellow, brown to blackStreak: White to brown Specific Gravity: 3.9-4.1Other Characteristics: (1) Adamantine luster on cleavage surface(2) As the amount of iron increases, the color will change from colorless, yellow, brown to black while the streaks will turn from white to brown. |
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