| 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 Cryolite |
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| Mohs Hardness | 2.5Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Specific Gravity | 2.97Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Optical Properties of Cryolite |
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| Refractive Index | 1.338 to 1.339Ulrich 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 | 0.001Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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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 | TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Crystallography of Cryolite |
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| Crystal System | MonoclinicUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Habit | Short prismatic or pseudocubicMichael O’Donoghue, Gems, Sixth Edition (2006) |
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| Geological Environment |
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| Where found: | Cryolite occurs in some granite pegmatites, in topaz-bearing, fluorine-rich rhyolites and elsewhere.Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Further Information |
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| Mineral information: | Cryolite information at mindat.org |
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| Significant Gem Localities |
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| Greenland | |
- Ivittuut town (formerly Ivigtût)
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 402 |
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