| General Information |
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| Chemical Formula | Anthony et al, Handbook of Mineralogy (2001) |
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| Physical Properties of Nosean |
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| Mohs Hardness | 5.5Anthony et al, Handbook of Mineralogy (2001) |
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| Specific Gravity | 2.30 to 2.40Anthony et al, Handbook of Mineralogy (2001) |
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| Tenacity | BrittleAnthony et al, Handbook of Mineralogy (2001) |
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| Cleavage Quality | IndistinctAnthony et al, Handbook of Mineralogy (2001) |
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| Fracture | Uneven,ConchoidalAnthony et al, Handbook of Mineralogy (2001) |
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| Optical Properties of Nosean |
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| Optical Character | IsotropicAnthony et al, Handbook of Mineralogy (2001) |
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| Birefringence | WeakAnthony et al, Handbook of Mineralogy (2001) |
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| Colour |
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| Colour (General) | Colorless, white, gray, gray-brown, blue, black from iron contamination, may be irregularly distributed; colorless to blue in thin section.Anthony et al, Handbook of Mineralogy (2001) |
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| Transparency | Transparent,TranslucentAnthony et al, Handbook of Mineralogy (2001) |
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| Lustre | VitreousAnthony et al, Handbook of Mineralogy (2001) |
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| Crystallography of Nosean |
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| Crystal System | IsometricAnthony et al, Handbook of Mineralogy (2001) |
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| Habit | Crystals are dodecahedra, to 2 mm; commonly as grains, or massive.Anthony et al, Handbook of Mineralogy (2001) |
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| Geological Environment |
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| Where found: | In silica-deficient alkalic volcanic rocks, principally phonolitesAnthony et al, Handbook of Mineralogy (2001) |
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| Further Information |
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| Mineral information: | Nosean information at mindat.org |
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