General Information |
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A variety or type of: | Chalcedony, which is a variety of Quartz |
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Chemical Formula | Arthur Thomas, Gemstones (2009) |
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Physical Properties of Binghamite |
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Mohs Hardness | 6.5 to 7Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Specific Gravity | 2.55 to 2.70Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Optical Properties of Binghamite |
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Refractive Index | 1.530 to 1.543Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Optical Character | Uniaxial/+Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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Birefringence | 0.003 to 0.009Herve Nicolas Lazzarelli, Blue Chart Gem Identification (2010) |
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Chatoyancy | YesGemdat.org, Management Team (2012) |
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Colour |
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Colour (General) | Yellowish to reddishGemdat.org, Management Team (2012) |
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Transparency | Translucent,OpaqueArthur Thomas, Gemstones (2009) |
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Lustre | Waxy,ResinousArthur Thomas, Gemstones (2009) |
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Crystallography of Binghamite |
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Crystal System | TrigonalUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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Habit | Fibrous to grained aggregateUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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Inclusions in Binghamite |
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Dense and parallel fibres of Goethite and/or Hematite |
Further Information |
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Mineral information: | Binghamite information at mindat.org |
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Significant Gem Localities |
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| USA | |
| Gemstones of the world, W. Schumann, 2001, p. 204 |
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