| Mineral | Margarosanite |
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| Formula | Pb(Ca,Mn2+)2(Si3O9) |
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| Crystal Form | Triclinic/Pinacoidal [1] |
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| Cleavage | {010} perfect, {100} good, {001} fair |
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| Color | Colorless, white, grayish-white |
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| Density | 4.3 – 4.3 g/cm3 |
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| Diaphaneity | Transparent, Translucent |
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| Fracture | Irregular/Uneven, Micaceous |
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| Hardness | 2.5 - 3.0 |
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| Lustre | Sub-Adamantine, Vitreous, Sub-Vitreous, Resinous, Pearly, Dull |
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| Streak | White |
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| Type Loc. | Parker Mine, Franklin Mine, Franklin, Franklin Mining District, Sussex Co., NJ, USA |
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| Dana 8 Class | 59.1.2.2 |
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| Strunz Class | 9.CA.25 |
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| Mindat | mindat.org |
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| WebMineral | WebMineral |
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| ID | 488 |
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