General Information |
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Chemical Formula | Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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Physical Properties of Pezzottaite |
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Mohs Hardness | 7.5 to 8Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Specific Gravity | 2.90 to 3.14Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Tenacity | BrittleArthur Thomas, Gemstones (2009) |
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Cleavage Quality | ImperfectArthur Thomas, Gemstones (2009) |
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Fracture | ConchoidalArthur Thomas, Gemstones (2009) |
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Optical Properties of Pezzottaite |
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Refractive Index | 1.598 to 1.620Herve 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 | 0.007 to 0.011Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Pleochroism | Strong: pinkish-orange - purplish-pinkHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Chatoyancy | YesUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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Colour |
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Colour (General) | Rose-red, pinkUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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Colour (Chelsea Filter) | Faint pink-(orangy)Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Transparency | Transparent,TranslucentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) 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) | Mostly inertHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Crystallography of Pezzottaite |
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Crystal System | TrigonalHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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Habit | TabularArthur Thomas, Gemstones (2009) |
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Geological Environment |
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Where found: | Occurs as isolated crystals in vugs in granitic pegmatites.Arthur Thomas, Gemstones (2009) |
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Inclusions in Pezzottaite |
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Growth tubes, fractures, "fingerprints", fluid inclusions - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 5 |
Further Information |
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Mineral information: | Pezzottaite information at mindat.org |
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Significant Gem Localities |
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| Afghanistan | |
| Herb Obodda |
| Lapis Extra (English) No. 7 (2005) p12 | | Madagascar | |
- Ambatofinandrahana District
| Laurs, B. L. et al. (2003): Pezzottaite from Ambatovita, Madagaascar: A new Gem mineral. Gems & Gemology 39 (4): 284-301 |
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