| General Information |
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| Chemical Formula | Arthur Thomas, Gemstones (2009) |
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| Physical Properties of Moissanite |
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| Mohs Hardness | 9 to 9.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Specific Gravity | 3.17 to 3.24Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Cleavage Quality | PoorAnthony et al, Handbook of Mineralogy (2001) More from other references |
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| Fracture | ConchoidalAnthony et al, Handbook of Mineralogy (2001) |
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| Heat Sensitivity | May turn yellowish if heated (250 watt bulb)Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Optical Properties of Moissanite |
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| Refractive Index | 2.648 to 2.691Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Optical Character | Uniaxial/+Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Birefringence | 0.043Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Pleochroism | Weak: light blue - deep indigoAnthony et al, Handbook of Mineralogy (2001) More from other references |
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| Dispersion | 0.104Arthur Thomas, Gemstones (2009) |
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| Colour |
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| Colour (General) | Colourless, greenish, yellowishUlrich 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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| Lustre | Adamantine,MetallicAnthony et al, Handbook of Mineralogy (2001) More from other references |
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| Fluorescence & other light emissions |
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| Fluorescence (General) | Usually dark orange or light blueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Crystallography of Moissanite |
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| Crystal System | HexagonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Habit | As hexagonal plates, to 5 mm, platy to elongated, rounded; polytypes are commonly syntactically intergrown.Anthony et al, Handbook of Mineralogy (2001) More from other references |
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| Geological Environment |
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| Where found: | A rare mineral: formed in an iron meteorite; as inclusions in diamond; in diamondiferous kimberlites and lamproites, and in eclogite; in volcanic breccias and rhyolite; in alluvium.Anthony et al, Handbook of Mineralogy (2001) |
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| Inclusions in Moissanite |
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| Inclusions: white needles - Gemmological Tables, Ulrich Henn and Claudio C. Milisenda, 2004, p 32 |
| Further Information |
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| Mineral information: | Moissanite information at mindat.org |
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