metamorphic
Nephrite Jade
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
AI-generated identification · may be incorrectHardness of 6-6.5 on the Mohs scale, deep green to dark forest green color, greasy to vitreous luster, microcrystalline fibrous habit, and extreme toughness.
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Physical properties
Hardness of 6-6.5 on the Mohs scale, deep green to dark forest green color, greasy to vitreous luster, microcrystalline fibrous habit, and extreme toughness.
Formation & geological history
Formed through metamorphic alteration of serpentinite or dolomite under high pressure and moderate temperature in convergent tectonic zones.
Uses & applications
Used extensively in carving, ornamental objects, fine jewelry, and historical weaponry due to its remarkable impact resistance.
Geological facts
Nephrite is significantly tougher than jadeite due to its interwoven fibrous crystal structure, making it shatter-resistant.
Field identification & locations
Identify by its waxy luster, dense feel, high specific gravity, and inability to be scratched by a steel knife. Plausible in the ophiolite belts of Iran.
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