| General Information |
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| A variety or type of: | Quartz |
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| Varieties/Types: | Morion - Sometimes synonymous with Smoky quartz, but often reserved for nearly black Smoky quartz. |
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| Other Names/Trade Names: | |
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| Chemical Formula | Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Smoky Quartz Treatments |
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| May be produced by irradiation of rock crystal (not detectable with standard tests) - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 7 |
| Physical Properties of Smoky Quartz |
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| Mohs Hardness | 7Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Specific Gravity | 2.65Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Tenacity | BrittleWalter Schumann, Gemstones of the world (2001) |
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| Cleavage Quality | NoneWalter Schumann, Gemstones of the world (2001) |
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| Fracture | ConchoidalWalter Schumann, Gemstones of the world (2001) |
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| Optical Properties of Smoky Quartz |
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| Refractive Index | 1.544 to 1.553Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Optical Character | Uniaxial/+Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Birefringence | 0.009Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Pleochroism | Dark: definite - brown, reddish-brownWalter Schumann, Gemstones of the world (2001) More from other references |
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| Dispersion | 0.013Walter Schumann, Gemstones of the world (2001) |
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| Colour |
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| Colour (General) | Clear brown colour and varying from a light brown to dark a brownMichael ODonoghue, Gems, Sixth Edition (2006) |
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| Causes of Colour | Smokey, color center related to the Al3+ impurity.W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) |
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| Transparency | Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Fluorescence & other light emissions |
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| Fluorescence (General) | Usually noneWalter Schumann, Gemstones of the world (2001) |
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| Crystallography of Smoky Quartz |
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| Crystal System | TrigonalUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Habit | Hexagonal prismsWalter Schumann, Gemstones of the world (2001) |
| Further Information |
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| Mineral information: | Smoky Quartz information at mindat.org |
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| Significant Gem Localities |
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| Bolivia | | |
| Laurs (2001, 2010) | |
| Laurs (2001, 2010) | | Brazil | | |
| Macri et al. (2006) | |
| Macri et al. (2006) | | Kenya | | |
| | | Madagascar | | |
| Madagascar, extraLapis English No.1, 2001, p. 46 | |
| Pezzotta (2001) | |
| Madagascar, extraLapis English No.1, 2001, p. 43 | |
| Danet (2009) | |
| | | Mozambique | | |
| Bettencourt-Dias and Wilson (2000) | | Myanmar | | |
| Ted Themelis (2008) Gems & mines of Mogok | |
| Ted Themelis (2008) Gems & mines of Mogok | | Sri Lanka | | |
| | | UK | | |
| No reference listed | | USA | |
- Warner Springs Mining District
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