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Physical Properties
Crystal System: OrthorhombicCrystal Form: Columnar or acicularHabit: Radiating or massiveHardness: 2Cleavage/Fracture: {010} perfect cleavage; Fracture: Conchoidal Luster: MetallicColor: Lead grayStreak: Lead graySpecific Gravity: 4.52-4.62Other Characteristics: (1) Distinct lengthwise striations on the crystal surface(2) Opaque |
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