General Information |
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A variety or type of: | Tourmaline |
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Chemical Formula | Na(Li | | Al | | )Al | | (Si | | O | | )(BO | | ) | | (OH) | | (OH) | Gemdat.org, Management Team (2012) |
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Photos of natural/un-cut material from mindat.org |
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Rubellite Treatments |
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Irradiation gives purple red colour. Gemologists can not detect the treatment. Both natural and treated colour can fade. - GIA, 2018
Color may be improved by irradiation. "Hot" pink to pinkish-red (often) result from irradiation of colorless, light green and pink varieties (not detectable) - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 5 |
Physical Properties of Rubellite |
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Mohs Hardness | 7 to 7.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Specific Gravity | 3.01 to 3.06Michael O’Donoghue, Gems, Sixth Edition (2006) |
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Tenacity | BrittleMichael O’Donoghue, Gems, Sixth Edition (2006) |
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Cleavage Quality | PoorMichael O’Donoghue, Gems, Sixth Edition (2006) |
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Fracture | Sub-ConchoidalArthur Thomas, Gemstones (2009) |
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Optical Properties of Rubellite |
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Refractive Index | 1.614 to 1.666Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Optical Character | Uniaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Birefringence | 0.014 to 0.040Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Pleochroism | Strong: dark red - pinkish-redHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Dispersion | 0.017Walter Schumann, Gemstones of the world (2001) |
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Colour |
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Transparency | Transparent,Translucent,OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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Lustre | VitreousArthur Thomas, Gemstones (2009) |
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Fluorescence & other light emissions |
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Fluorescence (General) | Inert to pinkishHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Crystallography of Rubellite |
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Crystal System | TrigonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Habit | Prismatic to acicular crystalsMichael O’Donoghue, Gems, Sixth Edition (2006) |
Further Information |
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Mineral information: | Rubellite information at mindat.org |
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Significant Gem Localities |
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| Afghanistan | |
| Bowersox and Chamberlin (1995) |
| Bowersox and Chamberlin (1995) |
| Glas (2002) | | Brazil | |
| Cassedanne and Roditi (1996) |
| Steger (1999) |
| Cassedanne and Roditi (1996) |
| Cassedanne and Roditi (1996) |
| Bastos (2002) |
| Cassedanne and Roditi (1996) | | Madagascar | |
| Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84 | | Mozambique | |
| Henn and Bank (1997) |
| Henn and Bank (1997) | | Myanmar | |
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- Pein-Pyit (Painpyit; Pyan Pyit)
| Ted Themelis (2008) Gems & mines of Mogok |
| Ted Themelis (2008) Gems & mines of Mogok |
| Kyi et al. (2005) | | Namibia | |
| Mossman (2002) | | Russia | |
| Godovikov and Bulgak (1993) |
| Godovikov and Bulgak (1993) |
| Godovikov and Bulgak (1993) | | Sri Lanka | |
| | | USA | |
- Mesa Grande Mining District
| Fisher et al. (1999) |
- Tourmaline Queen Mountain (Pala Mtn; Queen Mtn)
| Fisher et al. (1999) |
- Warner Springs Mining District
| Laurs (2001, 2002, 2004) |
| Freeman (2005) |
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