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Nepheline


Mineral Properties and Uses



Physical Properties of Nepheline

Chemical Classification silicate
Color colorless, white, yellowish, brownish red, greenish
Streak white
Luster greasy to vitreous
Diaphaneity transparent to translucent
Cleavage poor
Mohs Hardness 5.5 to 6
Specific Gravity 2.6 to 2.7
Diagnostic Properties greasy luster, poor cleavage
Chemical Composition (Na,K)AlSiO4
Crystal System hexagonal
Uses industrial use, glass industry.


Nepheline, brownish red
Nepheline from Bancroft, Ontario, Canada. Specimen is approximately 4 inches (10 centimeters) across.


Nepheline cancrinite syenite
Nepheline cancrinite syenite from Litchfield, Maine. Specimen is approximately 4 inches (10 centimeters) across.



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Nepheline
Nepheline from Dungannon Township, Ontario, Canada. Specimen is approximately 3 inches (7.6 centimeters) across.




Nepheline from Canada
Nepheline from Dungannon Township, Ontario, Canada. Specimen is approximately 3 inches (7.6 centimeters) across.


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