General Information | |||||||||
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Chemical Formula |
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Physical Properties of Zincite | |||||||||
Mohs Hardness | 4Gems, Sixth Edition (2006) , NaturalMore from other references | ||||||||
Specific Gravity | 5.50 to 5.90The Journal of Gemmology (1995) , More from other references | ||||||||
Tenacity | BrittleManagement Team (2012) , | ||||||||
Cleavage Quality | PerfectGemstones (2009) , | ||||||||
Fracture | Sub-ConchoidalGemstones (2009) , | ||||||||
Optical Properties of Zincite | |||||||||
Refractive Index | 2.013 to 2.029Gems, Sixth Edition (2006) , NaturalMore from other references | ||||||||
Optical Character | UniaxialThe Journal of Gemmology (1995) , More from other references | ||||||||
Birefringence | 0.016Gems, Sixth Edition (2006) , More from other references | ||||||||
Pleochroism | Very weak, in two tones of body colourThe Journal of Gemmology (1995) , | ||||||||
Dispersion | LowGemstones (2009) , | ||||||||
Colour | |||||||||
Colour (General) | Medium-light yellow, medium orange, medium-dark reddish-orangeThe Journal of Gemmology (1995) , More from other references | ||||||||
Colour (Chelsea Filter) | Yellow stone: no reaction (appears yellowish-green). Orange stone: weak pink. Reddish-orange stone: moderate redThe Journal of Gemmology (1995) , | ||||||||
Transparency | TransparentThe Journal of Gemmology (1995) , More from other references | ||||||||
Lustre | SubadamantineThe Journal of Gemmology (1995) , | ||||||||
Fluorescence & other light emissions | |||||||||
Fluorescence (General) | LW > SW; both universely propotional to depth of body colourThe Journal of Gemmology (1995) , | ||||||||
Fluorescence (Short Wave UV) | Inert to very weak to moderate, yellow to orangeThe Journal of Gemmology (1995) , | ||||||||
Fluorescence (Long-Wave UV) | Very weak to moderate, yellow to yellow-orangeThe Journal of Gemmology (1995) , | ||||||||
Crystallography of Zincite | |||||||||
Crystal System | HexagonalGemstones (2009) , | ||||||||
Habit | Usually massive, foliated; also compact granular, and in rounded irregular masses.Management Team (2012) , More from other references | ||||||||
Geological Environment | |||||||||
Where found: | Occurs as a primary mineral in metamorphosed stratiform zinc ore bodies.Gems, Sixth Edition (2006) , | ||||||||
Further Information | |||||||||
Mineral information: | Zincite information at mindat.org | ||||||||
Significant Gem Localities | |||||||||
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