![White Jade (Nephrite) (Tremolite-Actinolite series [Ca2(Mg,Fe)5Si8O22(OH)2]) — metamorphic](https://media.rock.id/white-jade-nephrite-16a72e40-fde0-4919-a267-90eae0e67f38-compressed.jpg)
metamorphic
White Jade (Nephrite)
Tremolite-Actinolite series [Ca2(Mg,Fe)5Si8O22(OH)2]
Hardness: 6-6.5 (Mohs scale), Color: Creamy white to pale gray, Luster: Greasy to vitreous, Crystal Structure: Monoclinic (fibrous/massive), Fracture: Splintery to uneven, Specific Gravity: 2.9-3.0
- Hardness
- 6-6
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Physical properties
Hardness: 6-6.5 (Mohs scale), Color: Creamy white to pale gray, Luster: Greasy to vitreous, Crystal Structure: Monoclinic (fibrous/massive), Fracture: Splintery to uneven, Specific Gravity: 2.9-3.0
Formation & geological history
Formed through the regional metamorphism of magnesium-rich limestones (dolomites) or through the hydrothermal alteration of ultramafic rocks. Commonly found in serpentine deposits.
Uses & applications
Primarily used for jewelry, talismans, religious symbols, decorative carvings, and small ornamental objects. Highly valued in Asian cultures for its durability and spiritual symbolism.
Geological facts
White nephrite jade is often referred to as 'Mutton Fat Jade' when it has a particularly high-quality, creamy, waxy appearance. It is one of the toughest natural materials due to its interlocking fibrous structure, making it difficult to break.
Field identification & locations
Identify by its characteristic greasy luster and high toughness; it is cool to the touch and cannot be scratched by a steel knife. Commonly sourced from China, Russia, Canada, and New Zealand.
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