metamorphic
Nephrite Jade
Ca2(Mg, Fe)5Si8O22(OH)2
Hardness: 6.0-6.5; Color: Deep forest green; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous/interlocking); Specific Gravity: 2.90-3.03.
- Hardness
- 6
- Color
- Deep forest green
- Luster
- Vitreous to greasy
Identified More metamorphic →
Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6.0-6.5; Color: Deep forest green; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous/interlocking); Specific Gravity: 2.90-3.03.
Formation & geological history
Formed through the metamorphism of magnesium-rich limestones or dolomites, or from the hydrothermal alteration of ultramafic rocks. Found in metamorphic belts worldwide.
Uses & applications
Extensively used in jewelry, ornamental carvings, sculpture, and historically in axe heads due to its extreme toughness.
Geological facts
Nephrite is one of two distinct minerals known as jade (the other being Jadeite). It is famous for its exceptional toughness, which is even higher than diamond, due to its interlocking fibrous structure.
Field identification & locations
Identified by its waxy luster and difficulty to break or scratch compared to common green stones. Found in British Columbia, New Zealand, Russia, and China.
More like this
