Rinkite-(Ce)
Rinkite is named after Henrik Rink, Director of the Royal Greenland Board of Trade.
Rinkite forms translucent to opaque reddish brown, yellow-brown prismatic and flattened crystals or masses.
Rinkite gemstones have been fashioned.
| General Information |
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| Chemical Formula | | (Ca,Ce) | | Na(Na,Ca) | | Ti(Si | | O | | ) | | F | | (O,F) | | |
Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Photos of natural/un-cut material from mindat.org |
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| Physical Properties of Rinkite-(Ce) |
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| Mohs Hardness | 5Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Specific Gravity | 3.29 to 3.33Ulrich 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 | DistinctAnthony et al, Handbook of mineralogy (2001) |
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| Fracture | Uneven,ConchoidalAnthony et al, Handbook of mineralogy (2001) |
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| Optical Properties of Rinkite-(Ce) |
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| Refractive Index | 1.653 to 1.662Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Optical Character | Biaxial/+Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Birefringence | 0.009Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Pleochroism | Slight, in yellow tints.Anthony et al, Handbook of mineralogy (2001) |
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| Colour |
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| Colour (General) | Yellow-brownUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Transparency | TranslucentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Lustre | Vitreous,Resinous,GreasyAnthony et al, Handbook of mineralogy (2001) |
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| Crystallography of Rinkite-(Ce) |
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| Crystal System | MonoclinicMichael O’Donoghue, Gems, Sixth Edition (2006) |
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| Habit | MassiveMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Geological Environment |
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| Where found: | Rinkite occurs in nepheline syenites and related pegmatites.Michael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Further Information |
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| Mineral information: | Rinkite-(Ce) information at mindat.org |
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| Significant Gem Localities |
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