| 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 Pyrargyrite |
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| Mohs Hardness | 2.5 to 3Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Specific Gravity | 5.85Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Tenacity | BrittleAnthony et al, Handbook of Mineralogy (2001) |
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| Cleavage Quality | Imperfect,DistinctAnthony et al, Handbook of Mineralogy (2001) More from other references |
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| Fracture | Uneven,ConchoidalAnthony et al, Handbook of Mineralogy (2001) More from other references |
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| Light Sensitivity | May darken on exposure to lightMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Optical Properties of Pyrargyrite |
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| Refractive Index | 2.881 to 3.084Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Optical Character | Uniaxial/-Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Birefringence | 0.203Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Pleochroism | Distinct in airAnthony et al, Handbook of Mineralogy (2001) More from other references |
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| Dispersion | StrongArthur Thomas, Gemstones (2009) |
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| Colour |
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| Colour (General) | Gray, black, redUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Transparency | Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Lustre | AdamantineMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Crystallography of Pyrargyrite |
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| Crystal System | TrigonalUlrich 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: | Pyrargyrite occurs in hydrothermal veins as a primary late-stage low-temperature mineral.Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Further Information |
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| Mineral information: | Pyrargyrite information at mindat.org |
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| Significant Gem Localities |
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| Bolivia | | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 441 | | Chile | | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 441 |
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