metamorphic
White Jade (Nephrite or Jadeite)
Tremolite-Actinolite / Sodium Aluminum Silicate (NaAlSi2O6)
AI-generated identification · may be incorrectHardness: 6-7 (Mohs); Color: Milky white to translucent white; Luster: Greasy to vitreous; Crystal structure: Monoclinic; Cleavage: None/splintery; Specific gravity: 2.9-3.3
- Hardness
- 6-7 (Mohs)
- Color
- Milky white to translucent white
- Luster
- Greasy to vitreous
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Physical properties
Hardness: 6-7 (Mohs); Color: Milky white to translucent white; Luster: Greasy to vitreous; Crystal structure: Monoclinic; Cleavage: None/splintery; Specific gravity: 2.9-3.3
Formation & geological history
Formed under high pressure and low temperature metamorphic conditions, typically in subduction zones or along fault lines involving serpentinite and dolomitic marble.
Uses & applications
Primarily used for high-end jewelry, beadwork, ornamental carvings, and historical artifacts. Highly valued in Asian cultures as a symbol of purity and longevity.
Geological facts
White jade is often referred to as 'Mutton Fat Jade' when it has a specific creamy, translucent quality. It is tougher than steel due to its interlocking fibrous structure, making it incredibly resistant to fracture.
Field identification & locations
Identify by its characteristic 'greasy' feel and high toughness. In the field, look for smooth, water-worn boulders in riverbeds in regions like Xinjiang (China), Myanmar, or British Columbia. Natural white jade should feel cold to the touch.
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