| 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 Tugtupite |
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| Mohs Hardness | 4 to 6.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Specific Gravity | 2.30 to 2.60Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Cleavage Quality | DistinctArthur Thomas, Gemstones (2009) |
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| Fracture | Uneven,ConchoidalArthur Thomas, Gemstones (2009) |
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| Optical Properties of Tugtupite |
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| Refractive Index | 1.494 to 1.504Herve 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 | 0.008Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Pleochroism | ModerateArthur Thomas, Gemstones (2009) |
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| Colour |
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| Colour (General) | Common white to black mottlingHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Causes of Colour | Pink, color center(s) involving sulphurW. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) |
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| Transparency | OpaqueHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Lustre | VitreousArthur Thomas, Gemstones (2009) |
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| Fluorescence & other light emissions |
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| Fluorescence (General) | Tugtupite shows an attractive fluorescence with the red response to UV appearing stronger in SW than in LW.Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Fluorescence (Short Wave UV) | Salmon redHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Fluorescence (Long-Wave UV) | OrangeHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Crystallography of Tugtupite |
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| Crystal System | TetragonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Habit | Pseudocubic, showing short prisms with pyramids and sphenoidsMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Geological Environment |
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| Where found: | Tugtupite occurs in hydrothermal veins cutting sodalite syenite and syenite.Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Inclusions in Tugtupite |
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| May contain black needles or yellow spots - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 9 |
| Further Information |
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| Mineral information: | Tugtupite information at mindat.org |
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| Significant Gem Localities |
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| Greenland | | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 461 |
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