metamorphic
Jadeite (Jade)
Jadeite; NaAlSi2O6
Hardness: 6.5-7.0 (Mohs). Color: Vivid green (Imperial). Luster: Vitreous to greasy. Crystal structure: Monoclinic (fibrous/granular aggregate). Specific gravity: 3.24-3.43.
- Hardness
- 6
- Color
- Vivid green (Imperial)
- Luster
- Vitreous to greasy
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Physical properties
Hardness: 6.5-7.0 (Mohs). Color: Vivid green (Imperial). Luster: Vitreous to greasy. Crystal structure: Monoclinic (fibrous/granular aggregate). Specific gravity: 3.24-3.43.
Formation & geological history
Formed in high-pressure, low-temperature environments in subduction zones. Typically associated with serpentinite and found in metamorphic rocks. Most high-quality deposits are in Myanmar.
Uses & applications
Predominantly used for high-end jewelry (bangles, beads, carvings) and ornamental art. Historically used for axe heads and weapons due to its extreme toughness.
Geological facts
Jadeite is one of two minerals known as 'Jade' (the other being Nephrite). The highly prized 'Imperial Jade' is emerald-green due to chromium trace elements. It is exceptionally tough because of its interlocking crystal structure.
Field identification & locations
Identify by its unique 'cool to the touch' feel, dense weight, and ringing sound when struck lightly. Most commercial bangles like this are treated (Type B/C); natural, untreated Jadeite (Type A) is rare and sought after by collectors.
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