| General Information |
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| A variety or type of: | Spinel |
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| Chemical Formula | Gemdat.org, Management Team (2012) More from other references |
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| Physical Properties of Ceylonite |
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| Mohs Hardness | 7.5 to 8Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Specific Gravity | 3.63 to 3.9Roger Dedeyn, Tables of Gemstone Identification (2007) |
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| Cleavage Quality | NoneMichael O’Donoghue, Gems, Sixth Edition (2006) |
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| Fracture | ConchoidalArthur Thomas, Gemstones (2009) |
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| Optical Properties of Ceylonite |
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| Refractive Index | 1.770 to 1.780Roger Dedeyn, Tables of Gemstone Identification (2007) |
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| Optical Character | IsotropicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Colour |
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| Transparency | Transparent,Translucent,OpaqueMichael O’Donoghue, Gems, Sixth Edition (2006) |
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| Lustre | VitreousArthur Thomas, Gemstones (2009) |
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| Crystallography of Ceylonite |
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| Crystal System | IsometricHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Further Information |
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| Mineral information: | Ceylonite information at mindat.org |
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| Significant Gem Localities |
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