| 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 Stibiotantalite |
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| Mohs Hardness | 5.5 to 6Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Specific Gravity | 7.20 to 7.90Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Tenacity | BrittleAnthony et al, Handbook of mineralogy (2001) |
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| Cleavage Quality | DistinctUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) |
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| Fracture | Sub-ConchoidalAnthony et al, Handbook of mineralogy (2001) |
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| Optical Properties of Stibiotantalite |
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| Refractive Index | 2.37 to 2.45Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Optical Character | Biaxial/+Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Birefringence | 0.08Ulrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Dispersion | StrongAnthony et al, Handbook of mineralogy (2001) |
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| Colour |
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| Colour (General) | Brown, yellow-brown, reddish, greenishUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Transparency | TransparentUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Lustre | Adamantine,ResinousAnthony et al, Handbook of mineralogy (2001) |
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| Crystallography of Stibiotantalite |
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| Crystal System | OrthorhombicUlrich Henn and Claudio C. Milisenda, Gemmological Tables (2004) More from other references |
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| Habit | Equant or flattened prismatic crystalsMichael O’Donoghue, Gems, Sixth Edition (2006) |
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| Geological Environment |
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| Where found: | Stibiotantalite occurs in complex granite pegmatites.Michael O’Donoghue, Gems, Sixth Edition (2006) |
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| Further Information |
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| Mineral information: | Stibiotantalite information at mindat.org |
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| Significant Gem Localities |
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| Mozambique | | |
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 455 | | USA | |
- Mesa Grande Mining District
| Gems, Sixth Edition, Michael O’Donoghue, 2006, p. 455 |
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