| General Information |
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| Chemical Formula | Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Physical Properties of Vivianite |
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| Mohs Hardness | 2Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Specific Gravity | 2.60 to 2.70Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Tenacity | FlexibleAnthony et al, Handbook of mineralogy (2001) |
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| Cleavage Quality | PerfectUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Light Sensitivity | Alters to blue or green on exposure to lightUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Optical Properties of Vivianite |
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| Refractive Index | 1.560 to 1.640Ulrich 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 | 0.054 to 0.075Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Pleochroism | Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Dispersion | WeakAnthony et al, Handbook of mineralogy (2001) |
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| Colour |
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| Colour (General) | ColourlessUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Transparency | OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Lustre | Vitreous,Pearly,Dull (Earthy)Anthony et al, Handbook of mineralogy (2001) |
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| Crystallography of Vivianite |
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| Crystal System | MonoclinicUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Habit | PrismaticMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Geological Environment |
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| Where found: | Vivianite occurs as a secondary mineral
in the oxidized zone of metallic-ore deposits and in complex granite pegmatites.Michael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Further Information |
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| Mineral information: | Vivianite information at mindat.org |
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| Significant Gem Localities |
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| Bolivia | | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 464 | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 464 | | Cameroon | | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 464 |
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