metamorphic
Jadeite Jade
NaAlSi2O6 (Sodium Aluminum Silicate)
Hardness: 6.5–7.0 on Mohs scale; Color: Pale green to lavender/translucent; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous aggregates); Cleavage: Splintery fracture; Specific gravity: 3.24–3.43
- Hardness
- 6
- Color
- Pale green to lavender/translucent
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5–7.0 on Mohs scale; Color: Pale green to lavender/translucent; Luster: Vitreous to greasy; Crystal structure: Monoclinic (fibrous aggregates); Cleavage: Splintery fracture; Specific gravity: 3.24–3.43
Formation & geological history
Formed in metamorphic rocks under high pressure and low temperature conditions, typically in subduction zones. Most high-quality specimens date from the Mesozoic era.
Uses & applications
Primarily used in jewelry (rings, bangles, pendants), ornamental carvings, and historical artifacts. Highly valued in East Asian cultures for spiritual protection.
Geological facts
Jadeite is one of two minerals recognized as 'Jade' (the other being Nephrite). It is significantly tougher and rarer than nephrite. The most prized variety is called 'Imperial Jade'.
Field identification & locations
Identify by its 'cold' feel, high density, and resonance when struck. It cannot be scratched by a steel knife. Common locations include Myanmar (Burma), Guatemala, Japan, and Russia.
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