Narsarsukite
Narsarsukite is named after its discovery locality, at Narsarsuk, southern Greenland.
Narsarsukite forms olive-green, honey-yellow to lemon-yellow, reddish brown, brownish gray, tan, pink crystals of small size. The material can be faceted into small attractive gems.
| General Information |
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| Chemical Formula | Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Physical Properties of Narsarsukite |
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| Mohs Hardness | 6 to 7Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Specific Gravity | 2.72 to 2.83Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Tenacity | BrittleAnthony et al, Handbook of Mineralogy (2001) |
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| Cleavage Quality | PerfectUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Fracture | Uneven,Sub-ConchoidalAnthony et al, Handbook of Mineralogy (2001) |
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| Optical Properties of Narsarsukite |
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| Refractive Index | 1.610 to 1.647Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Optical Character | Uniaxial/+Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Birefringence | 0.033Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Colour |
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| Colour (General) | GreenUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Transparency | Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Lustre | Vitreous,PearlyAnthony et al, Handbook of Mineralogy (2001) |
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| Crystallography of Narsarsukite |
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| Crystal System | TetragonalUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Habit | Crystals, commonly flat tabular to equant, rarely prismatic, striated, to 3 cm. In divergent, radiating groups; as fine grained segregations, massive.Anthony et al, Handbook of Mineralogy (2001) |
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| Geological Environment |
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| Where found: | In pegmatite (Narssarssuk, Greenland); in quartz veins in syenite intruding limestone (Sweetgrass Hills, Montana, USA); in hornfels, igneous breccia, and marble xenoliths in an intrusive alkalic gabbro-syenite complex (Mont Saint Hilaire, Canada).Anthony et al, Handbook of Mineralogy (2001) |
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| Further Information |
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| Mineral information: | Narsarsukite information at mindat.org |
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| Significant Gem Localities |
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| Canada | |
- La Vallée-du-Richelieu RCM
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