| General Information |
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| Chemical Formula | Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Physical Properties of Hypersthene |
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| Mohs Hardness | 5.5Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Specific Gravity | 3.44 to 3.58Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Cleavage Quality | DistinctUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Optical Properties of Hypersthene |
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| Refractive Index | 1.686 to 1.725Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Optical Character | Biaxial/-Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Birefringence | 0.013 to 0.015Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Pleochroism | Green stones - strong: (dark) bluish-green - brownish-red - (yellowish)Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Colour |
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| Colour (General) | Black, black-brown, black-greenUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Transparency | OpaqueUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Crystallography of Hypersthene |
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| Crystal System | OrthorhombicHerve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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| Inclusions in Hypersthene |
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| Tabular inclusions of hematite and goethite - Blue Chart Gem Identification, Herve Nicolas Lazzarelli, 2010, p 4 |
| Further Information |
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| Mineral information: | Hypersthene information at mindat.org |
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