| General Information |
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| Varieties/Types: | |
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| Chemical Formula | Michael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Physical Properties of Enstatite |
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| Mohs Hardness | 5.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Specific Gravity | 3.20 to 3.25Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Cleavage Quality | DistinctUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Fracture | ConchoidalArthur Thomas, Gemstones (2009) |
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| Optical Properties of Enstatite |
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| Refractive Index | 1.652 to 1.668Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Optical Character | Biaxial/+Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Birefringence | 0.08Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Pleochroism | Brown variety has strong trichroism: pinkish red to brown - yellow - green; Green variety - distinct: yellow-green - greenHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Dispersion | WeakArthur Thomas, Gemstones (2009) |
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| Chatoyancy | Star 4, rarely 8. Black star: fuzzy rays, bronze color sheenHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Colour |
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| Colour (General) | Green, yellowish-green, brownish-green, greenish-gray, yellow-brown, brownish-pinkUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Causes of Colour | Greenish brown, Fe2+. Green, Fe2+ with minor Cr3+W. William Hanneman, Pragmatic Spectroscopy For Gemologists (2011) |
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| Transparency | TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Lustre | Vitreous,PearlyArthur Thomas, Gemstones (2009) |
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| Crystallography of Enstatite |
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| Crystal System | OrthorhombicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) More from other references |
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| Habit | PrismaticMichael O’Donoghue, Gems, Sixth Edition (2006) More from other references |
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| Geological Environment |
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| Where found: | Enstatite occurs in pyroxenites, peridotites and dunites and in ultramafic inclusions in alkalic olivine basalts and kimberlite and in several other contexts.Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Further Information |
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| Mineral information: | Enstatite information at mindat.org |
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| Significant Gem Localities |
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| Myanmar | | |
| Ted Themelis (2008) Gems & mines of Mogok | |
| Ted Themelis (2008) Gems & mines of Mogok | |
| Ted Themelis (2008) Gems & mines of Mogok | |
| Ted Themelis (2008) Gems & mines of Mogok |
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