metamorphic
White Jade (Nephrite)
Nephrite (Ca2(Mg,Fe)5Si8O22(OH)2)
Hardness: 6-6.5 (Mohs), Color: Creamy white to pale green, Luster: Greasy to waxy, Crystal Structure: Monoclinic (fibrous/interlocking), Cleavage: Splintery fracture, Specific Gravity: 2.9-3.0
- Hardness
- 6-6
Identified More metamorphic →
Explore White Jade (Nephrite) in the encyclopedia →Identify your own rocks.
Get a report just like this from any photo, free.
Physical properties
Hardness: 6-6.5 (Mohs), Color: Creamy white to pale green, Luster: Greasy to waxy, Crystal Structure: Monoclinic (fibrous/interlocking), Cleavage: Splintery fracture, Specific Gravity: 2.9-3.0
Formation & geological history
Formed through regional metamorphism of magnesium-rich limestones (dolomites) or ultrabasic rocks. The interlocking fibrous structure makes it exceptionally tough.
Uses & applications
Primarily used in jewelry, ornamental carvings, and historical artifacts. Often referred to as 'Mutton Fat Jade' in high-quality white forms.
Geological facts
Nephrite was used in ancient China since the Neolithic period for ritual objects. It is tougher and more resistant to fracturing than Jadeite due to its interwoven felt-like structure.
Field identification & locations
Identify by its waxy luster and extreme toughness; it is very difficult to break. Commonly found in British Columbia, New Zealand, Russia, and China.
More like this
