| General Information |
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| Chemical Formula | Michael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Physical Properties of Witherite |
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| Mohs Hardness | 3.5Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Specific Gravity | 4.27 to 4.35Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Cleavage Quality | DistinctUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Fracture | UnevenArthur Thomas, Gemstones (2009) |
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| Optical Properties of Witherite |
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| Refractive Index | 1.529 to 1.680Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Optical Character | Biaxial/-Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Birefringence | 0.148Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Pleochroism | NilArthur Thomas, Gemstones (2009) |
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| Dispersion | LowArthur Thomas, Gemstones (2009) |
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| Colour |
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| Colour (General) | White, colourlessUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Transparency | Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Lustre | Vitreous,ResinousAnthony et al, Handbook of mineralogy (2001) More from other references |
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| Fluorescence & other light emissions |
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| Fluorescence (General) | Fluorescent and phosphorescent under UVAnthony et al, Handbook of mineralogy (2001) |
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| Fluorescence (Short Wave UV) | May show a green or yellow fluorescence with phosphorescenceMichael O’Donoghue, Gems, Sixth Edition (2006) |
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| Fluorescence (X-RAY) | Fluorescent and phosphorescent under X-raysAnthony et al, Handbook of mineralogy (2001) |
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| Crystallography of Witherite |
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| Crystal System | OrthorhombicUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Habit | Botryoidal to spherical fibrous or granular massesMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Geological Environment |
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| Where found: | Witherite occurs in hydrothermal veins as a low-temperature mineralMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Further Information |
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| Mineral information: | Witherite information at mindat.org |
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| Significant Gem Localities |
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| USA | | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p.467 |
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