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Mineralpedia Details for Zincite

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Zincite

Zincite

Named for the Zinc in its composition, crystals of this mineral are rare and as a result synthetic crystals are widespread. Relatively common, Zincite is a primary constituent of metamorphosed orebodies such as the stratiform zinc deposit of Franklin and Sterling Hill in New Jersey, USA. Also found as an altered, secondary mineral in oxidized zones of ore deposits rich in zinc. Additionally, Zincite is product of volcanism. Interestingly, Zincite is found at the Tonopah-Belmont mine in Arizona, USA as the result of a fire in the mine. Rarely, Zincite will fluoresce pale yellow under long-wave ultraviolet light.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/zincite.pdf

Formula
ZnO 
Crystal System
Hexagonal 
Crystal Habit
Massive - Fibrous, Granular, Disseminated 
Cleavage
Perfect, None, None 
Luster
Sub Metallic 
Color
yellow, dark yellow, dark red, orange 
Streak
yellowish orange 
Class
Hexagonal - Dihexagonal Pyramidal 
Fracture
Sub Conchoidal 
Hardness
4-5 
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Zincite from Franklin, Sussex Co., New Jersey, United States

Zincite
            from Franklin, Sussex Co., New Jersey, United States Bright red micro crystals of Zincite to 0.75mm.
Click thumbnail images for larger view.

Zincite from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States

Zincite
            from Sterling Hill mine, Ogdensburg, Sussex Co., New Jersey, United States Bright orange spherical crystal aggregates of secondary Zincite to 0.75mm.
Click thumbnail images for larger view.

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